Increasing and Decreasing Quantities

Increasing a quantity makes it bigger. Decreasing a quantity makes it smaller.

Example:

Increase the number 40 by 25%.

100% = 40

An increase means 100% + 25% = 125%

= (125/100) x 40 = 50

Decrease 40 by 25%.

A decrease means 100% – 25% = 75%

=(75/100) x 40 = 30

Exercises