Question

How much did Briana save by purchasing a backpack that costs $45 with a sales promotion of 20% off instead of a backpack that cost $42 with a sales promotion of 10% off?

Answer 1

45x.20=9
42x.10=4.2
9-4.2=$4.80

Answer 2

Briana saved $1.80.

Explanation:

When the sales promotion is 20% off.

Cost price is $45

Amount after discount is =
`45-(0.20*45)=36` dollars

When the sales promotion is 10% off.

Cost price is $42

Amount after discount is =
`42-(0.10*42)=37.80` dollars

Hence, Briana saved
`37.80-36=1.80` dollars