Mathematics
TestU11401002906
20

Monica paid sales tax of $2.80 when she bought a new bike helmet. If the sales tax rate was 7%, how much did the store charge for the bike helmet before tax?

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(1) Answers
rekeyia21

7 % of cost price is 2.80 , What about 1%?7 = 2.801 = x   (where x is the price value of 1% in dollars)We simplify the above equation, so:7 × x = 2.8 × 1  →  7x = 2.8 →  x = 2.8 / 7  →   x = 0.4 dollarsWe know that 100%  represents the whole price, so if 1% is 0.4 dollars, then 100% will be 0.4 × 100 = 40 dollarsTherefore the store charged $40  dollars for the helmet before tax

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