91.3% is the change from 115 to 220
Calculation steps:
[( 220 - 115 ) ÷ 115] x 100 = 91.3%
Formula
Percentage change = [(220 - 115) / 115] x 100
Subtract the new number by the original number
220 - 115 = 105
105 ÷ 115 = 0.9130434782608695
0.9130434782608695 x 100 = 91.3%