A discount voucher offering 15% off is used to pay a bill.After using the voucher, the bill is reduced to ?36.72.How much was th e bill before applying the voucher discount?
1 answer:
Answer:
$43.20
Step-by-step explanation:
To find the original purchase price, write a proportion and solve. A proportion is an equation where two ratios are set equal.
If the discount if 15% then you pay 85%.
To solve for y, cross multiply the numerator and denominator of each fraction.
36.72(100) = 85y
3672= 85y
43.2 = y
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