1. Do now:
Frances bought a car for £9 950.
A year later she sold it for £7 500.
What was her percentage loss?
Give you answer correct to 1dp
Eric does a paper round. He earns £24 each week. His boss has decided to give him a pay rise of £2 What percentage increase is that?
Sally used to be able to swim ten lengths in 19 minutes. Yesterday she managed to set a new personal best by swimming ten lengths in 18 minutes and 30 seconds. What percentage reduction is this?

2. Did you remember this important formula?
𝒑𝒆𝒓𝒄𝒆𝒏𝒕𝒂𝒈𝒆 𝒄𝒉𝒂𝒏𝒈𝒆= 𝒄𝒉𝒂𝒏𝒈𝒆 𝒐𝒓𝒊𝒈𝒊𝒏𝒂𝒍 𝒂𝒎𝒐𝒖𝒏𝒕 ×𝟏𝟎𝟎
Frances bought a car for £9 950.
A year later she sold it for £7 500.
What was her percentage loss?
Give you answer correct to 1dp
𝒑𝒆𝒓𝒄𝒆𝒏𝒕𝒂𝒈𝒆 𝒍𝒐𝒔𝒔= 𝟐𝟒𝟓𝟎 𝟗𝟗𝟓𝟎 ×𝟏𝟎𝟎 = 24.6%

3. You use the same formula for increases:
𝒑𝒆𝒓𝒄𝒆𝒏𝒕𝒂𝒈𝒆 𝒄𝒉𝒂𝒏𝒈𝒆= 𝒄𝒉𝒂𝒏𝒈𝒆 𝒐𝒓𝒊𝒈𝒊𝒏𝒂𝒍 𝒂𝒎𝒐𝒖𝒏𝒕 ×𝟏𝟎𝟎
Eric does a paper round. He earns £24 each week. His boss has decided to give him a pay rise of £2 What percentage increase is that?
𝒑𝒆𝒓𝒄𝒆𝒏𝒕𝒂𝒈𝒆 𝒍𝒐𝒔𝒔= 𝟐 𝟐𝟒 ×𝟏𝟎𝟎 = 8.3%

4. Sally used to be able to swim ten lengths in 19 minutes
Sally used to be able to swim ten lengths in 19 minutes. Yesterday she managed to set a new personal best by swimming ten lengths in 18 minutes and 30 seconds. What percentage reduction is this?
Did you sort out the units correctly?
Sally improved her time by 30 seconds;
that’s the same as 0.5 minutes
𝒑𝒆𝒓𝒄𝒆𝒏𝒕𝒂𝒈𝒆 𝒍𝒐𝒔𝒔= 𝟎.𝟓 𝟏𝟗 ×𝟏𝟎𝟎 = 2.6%