When calculating the successive discounts of 15% and 10% on a $100 item, _____. a. take 10% of $85 b. take 10% of $90 c. take 15
2 answers:
Answrer
Option (a) is correct .
i.e take 10% of $85
Reason
As given
15% and 10% on a $100 item i.e first applied 15 % discount on $ 100 and than apply 10% discount .
15 % is written in the decimal form
= 0.15
Amount becomes when 15 % discount on$100 = 100 - 0.15 × 100
= 100 - 15
= $ 85
Now apply 10 % discount on $ 85.
10 % is written in the decimal form
= 0.1
Amount becomes when 15 % discount on$100 = 85- 0.1 × 85
= 85 - 8.5
= $ 76.5
Therefore the option (a) is correct about the successive discounts of 15% and 10% on a $100 item is $76.5 .
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