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17 September, 20:07

Mr. Krogman usually prices the umbrellas in his store $8 each. However, on a rainy day he increases the price by 75%. How much does he charge on a rainy day?

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  1. 17 September, 21:20
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    Calculator method:

    75% as a decimal is 75/100 = 0.75. So an increase of 75% is 100% + 75% which is the same as 1+0.75 = 1.75. This is your multiplier, so now just do 8*1.75=$14

    Non-calculator method:

    Find out what 50% of 8 is, this can be done by halving 8 which gives you 4. Now find out what 25% of 8 is, this can be done by halving what you got for 50% (4), so 25% of 8 is 2. 50%+25%=75%, so (4+2) = 6 is 75% of 8. Now just do 8+6 = $14

    The answer is in bold.
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