91.53=( a × b %)
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1 Answer

91.53=81x1.13, which is a 13% increase on 81. So a=81 and b=13%?

If the sum is over a number of days (not specified in the question), then the percentage will be different, but the quantity 81 stays the same:

7 days: 1.76% per day

6 days: 2.06% per day

5 days: 2.47% per day

4 days: 3.1% per day

3 days: 4.16% per day

2 days: 6.3% per day

1 day: 13% 


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