Question 66556
To solve this question you must first find the amount he makes in an hour

$160/40h=$4.00/h

if it was increased by 25%, take his wage (100%) add 25% to the value. because percents are decimals, 100% can be written as 1.0 and 25% can be written as .25
to find the new value multiply $4 by 1.25 (125%)

4x1.25 =$5/h 

now multiply it by the amount of hours he will spend working (60)
5x60=$300/week