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Firlakuza [10]
4 years ago
7

how much did briana save by purchasing a backpack that cost $45 with a sales promotion of 20% off instead of a backpack that cos

t $42 with a sales promotion of 10% off?
Mathematics
2 answers:
Arturiano [62]4 years ago
7 0

Answer: $1.8

Step-by-step explanation: Start by doing a proportion for each one. 20/100= x/45. 45 times 20 equals 900. 900 divided by 100 equals 9. So 20% off is $9 which makes you pay $36. Do the next proportion. 10/100=x/42. 42 times 10 is 420. 420 divided by 100 equals 4.2. You would get off $4.2 which makes you pay $37.8. $37.8-$36= $1.8.

joja [24]4 years ago
6 0
Start by doing a proportion for each one. 20/100= x/45. 45 times 20 equals 900. 900 divided by 100 equals 9. So 20% off is $9 which makes you pay $36. Do the next proportion. 10/100=x/42. 42 times 10 is 420. 420 divided by 100 equals 4.2. You would get off $4.2 which makes you pay $37.8. $37.8-$36= $1.8. Your answer is $1.8
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