Question

Last year, sales at a book store increased from $5,000 to $10,000. This year, sales decreased to $5,000 from $10,000. What percentage did sales increase last year? What percentage did sales decrease this year?

Answer 1

Solution:

we are given that

Last year, sales at a book store increased from $5,000 to $10,000.

As we know that percentage increase is given by the formula

Percentage increase$=\frac{change}{Initial}*100$

Substitute the values we get

Percentage increase$=\frac{10000-5000}{5000}*100$

Percentage increase $=\frac{5000}{5000}*100=100$ %.

This year, sales decreased to $5,000 from $10,000.

Percentage Decrease $=\frac{change}{Initial}*100$

Substitute the values we get

Percentage Decrease $=\frac{10000-5000}{10000}*100$

Percentage Decrease $=\frac{5000}{10000}*100=50$ %.

Answer 2

1. 200% =2
5000*2=10000
2.50% = .5
10000*.5=5000