Peters allowance is the same amount every month. each month peter spends $114 amd saves the rest. he saves $432 in a year.

The complete question is
Peter's allowance is the same every month.Each month Peter spends $114 and saves the rest.He saves $432 in a year.What Percent of his allowance does Peter save every month

let
x> Peter's allowance

we know that
432=(x-114)*12< 432=12x-1368> 12x=432+1368
12x=1800
x=1800/12
x=$150
Peter save every month> 150-114> $36

if $150> 100%
 $36> x
x=36*100/150> x=24%

the answer is
24%