36.84% is the change from 57 to 78
Calculation steps:
[( 78 - 57 ) ÷ 57] x 100 = 36.84%
Formula
Percentage change = [(78 - 57) / 57] x 100
Subtract the new number by the original number
78 - 57 = 21
21 ÷ 57 = 0.3684210526315789
0.3684210526315789 x 100 = 36.84%