Translate into an algebraic expression: 22 decreased by y%

Decreased = y% of 22 = y/100 x 22 = 0.22y

After decreased = 22 - 0.22y

Answer: 22 - 0.22y

We have to decrease 22 by y%.

First we need to calculate what is y% of 22. y% of 22 simply means y% into 22 i. e.

y% x 22

= 0.01 (y) x 22

= 0.22y

So 0.22 y is the y% of 22. Now we have to decrease 22 by its y% which becomes:

22 - y% of 22

= 22 - 0.22y

This expression can also be written as:

22 (1 - 0.01y)