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Sales Tax and Discounts
NS3. Add, subtract, multiply and divide multi-digit decimals using the standard algorithm for each operation
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10% Off 15% Off 20% Off 10% off means for every dollar (100 cents) you spend, you subtract 10% of $1 which is 10 cents. 15% off means for every dollar you spend, you subtract 15% of $1 which is 15 cents. 20% off means for every dollar you spend, you subtract 20% of $1 which is 20 cents. 10% of $1 = $0.10 15% of $1 = $0.15 20% of $1 = $0.20 10% of $2 = $0.20 15% of $2 = $0.30 20% of $2 = $0.40 10% of $3 = $0.30 15% of $3 = $0.45 20% of $3 = $0.60
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Let’s Practice Calculate the discount Find the new sale price
Fold a piece of paper in half two times to give you 4 work spaces on both sides. Pick 8 items. Label each step below for each problem in the workspace provided. For each of the following sale items you pick: Calculate the discount Find the new sale price Find the 7% sales tax Get the total price
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15% Off
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7.99 − Subtract 15% discount from the sale price 6.80 New price with 15% discount $6.80 6.8 × Find the Sales Tax $0.476 Sales Tax 6.80 7.99 × Ice cream maker Add Sales Tax Extra 15% discount $7.28 1.1985 Final price
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10.99 − Subtract 15% discount from the sale price 9.35 New price with 15% discount $9.35 9.35 × Find the Sales Tax $0.6545 Sales Tax 9.35 10.99 × H₂0 Bottles Add Sales Tax Extra 15% discount $10.00 1.6485 Final price
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25% Off
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70.97 − Subtract 25% discount from the sale price 53.23 New price with 25% discount $53.23 53.23 × Find the Sales Tax $3.7261 Sales Tax 53.23 70.97 × PC Lamp Add Sales Tax Extra 25% discount $56.96 Final price
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20% Off
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7.99 − Subtract 20% discount from the sale price 6.40 New price with 20% discount $6.40 6.4 × Find the Sales Tax $0.448 Sales Tax 6.40 7.99 × Girls Shirt Add Sales Tax Extra 20% discount $6.85 1.598 Final price
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16.00 − Subtract 20% discount from the sale price 12.80 New price with 20% discount $12.80 12.8 × Find the Sales Tax $0.896 Sales Tax 12.80 16 × Boys Shirt Add Sales Tax Extra 20% discount $13.70 3.2 Final price
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19.99 − Subtract 20% discount from the sale price 16.00 New price with 20% discount $16.00 16 × Find the Sales Tax $1.12 Sales Tax 16.00 19.99 × Mack Monkey Add Sales Tax Extra 20% discount $17.12 3.998 Final price
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16.99 − Subtract 20% discount from the sale price 13.60 New price with 20% discount $13.60 13.6 × Find the Sales Tax $0.952 Sales Tax 13.60 16.99 × Volcano Kit Add Sales Tax Extra 20% discount $1 4.55 3.398 Final price
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26.99 − Subtract 20% discount from the sale price 21.60 New price with 20% discount $21.60 21.6 × Find the Sales Tax $1.512 Sales Tax 21.60 26.99 × Tie Dye machine Add Sales Tax Extra 20% discount $23.11 5.398 Final price
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49.99 − Subtract 20% discount from the sale price 40.00 New price with 20% discount $40.00 40 × Find the Sales Tax $2.80 Sales Tax 40.00 49.99 × Soccer Goal Add Sales Tax Extra 20% discount $42.80 9.998 Final price
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139.99 − Subtract 20% discount from the sale price 112.00 New price with 20% discount $112.00 112 × Find the Sales Tax $7.84 Sales Tax 112.00 139.99 × Electric Guitar Add Sales Tax Extra 20% discount $119.84 27.998 Final price
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10% Off
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269.99 − 26.99 Subtract 10% discount from the sale price 243.00 New price with 10% discount $243.00 243.00 × Find the Sales Tax $ Sales Tax 243.00 269.99 × Arc Lamp Add Sales Tax Extra 10% discount $260.01 Final price
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229.99 − Subtract 10% discount from the sale price 207.00 New price with 10% discount $207.00 207 × Find the Sales Tax $14.49 Sales Tax 207.00 229.99 × Maui Lamp Add Sales Tax Extra 10% discount $221.49 Final price
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174.99 − Subtract 10% discount from the sale price 157.50 New price with 10% discount $157.50 157.50 × Find the Sales Tax $ Sales Tax 157.50 174.99 × Blue Gem Lamp Add Sales Tax Extra 10% discount $168.53 17.499 Final price
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219.99 − Subtract 10% discount from the sale price 198.00 New price with 10% discount $198 198 × Find the Sales Tax $13.86 Sales Tax 198.00 219.99 × Tiffany Lamp Add Sales Tax Extra 10% discount $211.86 21.999 Final price
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