91.11% is the change from 45 to 86
Calculation steps:
[( 86 - 45 ) ÷ 45] x 100 = 91.11%
Formula
Percentage change = [(86 - 45) / 45] x 100
Subtract the new number by the original number
86 - 45 = 41
41 ÷ 45 = 0.9111111111111111
0.9111111111111111 x 100 = 91.11%