Question

A pet store sells dog food for $26 for a 40-pound bag. If you have a 15% coupon, how much will the dog food cost?

Answer 1

percent means parts out of 100
15%=15/100=0.15
'of' means multiply
15% of 26 means
0.15 times 26=3.9 discount
26-3.9=22.1

it costs $22.9

Answer 2

the 40 pounds is unnecessary information

all you have to do is look for 15% of 26 and subtract it form 26

26 x .15 = 3.9
26 - 3.9 = $22.10