BUSINESS MATHEMATICS & STATISTICS

Basic calculations of percentages, salaries and investments using LECTURE 5 Review of Lecture 4 Basic calculations of percentages, salaries and investments using Microsoft Excel

Find the percent change Monday’s Sales were Rs.1000 and grew to Rs. 2500 the next day Find the percent change

CALCULATION Initial Value =1000 Final Value = 2500 Change = 1500 % Change = 1500/1000 x 100 = 150

HOW many Percent is Next Day’s sale with refernce to Monday’s Sale? Mondays’s sale= 1000 Next day’s sale= 2500 Next day’s sale as % = 2500/1000 x 100 = 250 % = Two and a half times

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In the making of dried fruit, 15kg. of fruit shrinks to 3 kg Find the percent change.

CALCULATION Original fruit = 15 kg Final fruit = 3 kg Change = 3-15 = -12 % change = - 12/15 x 100 = - 80 % Size was reduced by 80%

After mixing with water the weight of cotton increased from 3 kg to 15 kg Find the percent change.

CALCULATION Original weight = 3 kg Final weight = 15 kg Change = 15-3= 12 % change = 12/3 x 100 = 400 % Weight increased by 400%

An employee is currently earning 5000 rupees per month A union signed a three year collective agreement that provided for wage increases of 3%, 2%, and 1% in successive years An employee is currently earning 5000 rupees per month What will be the salary per month at the end of the of the term of the contract?

CALCULATION 5000(1 + 3%)(1 + 2%)(1 + 1%) = 5000 x 1.03 x 1.02 x 1.01

Investment for a period of 4 years Rates of return for each year are 4%, 8%, -10% and 9% respectively. If you invested Rs. 100,000 at the beginning of the term, how much will you have at the end of the last year?

BUSINESS MATHEMATICS & STATISTICS