There are 20.65% of the total number of students increased on the honor roll.
Percentage can be calculated by dividing the value by the total value, and then multiplying the result by 100.
Here, For last year
Total boys for honor roll = 100
total girls for honor roll = 84
total students for honor roll = 100+84 = 184
For present year,
Boys for honor roll = 100 + 100X0.17 = 117
Girls for honor roll = 84 + 84X0.25 = 105
Total students = 117 + 105 = 222
Increment in total students = 222 - 184 = 38
% increment in total student = 38 X 100 / 184
= 0.2065 X 100
= 20.65 %
Thus, there are 20.65% of the total number of students increased on the honor roll.
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