Question

Mr. Salas receives a 10% raise every year. His salary after four such raises has gone up by what percent?

Answer 1

`10%xx4=40%`

Explanation:

Mr. Salas receives a yearly raise of 10%

`r` = 10% = the rate of his yearly raise

`t` = 1 = the number of times he receives the 10% raise in one year

`x` = 4 = the number of raises Mr. Salas received

`y` = 40% = the amount his raise has gone up since year 1

`rxxtxxx=y=10%xx1xx4=40%`

After four 10% raises, Mr. Salas has earned 40% of his original salary which was 40% less than what he earns now.