Use PEMDAS. 20/(4*5)=1
Multiplication before dividion
Perimeter = 2(10+20) = 60feet
60ft fencing material is needed
% means per 100
so when figuring out percents it's good to use 100
so
on $100 7% would mean $7
on $50 7% would mean $3.5
in $200 7% would mean $14
