85.71% is the change from 49 to 91
Calculation steps:
[( 91 - 49 ) ÷ 49] x 100 = 85.71%
Formula
Percentage change = [(91 - 49) / 49] x 100
Subtract the new number by the original number
91 - 49 = 42
42 ÷ 49 = 0.8571428571428571
0.8571428571428571 x 100 = 85.71%