34.15% is the change from 164 to 220
Calculation steps:
[( 220 - 164 ) ÷ 164] x 100 = 34.15%
Formula
Percentage change = [(220 - 164) / 164] x 100
Subtract the new number by the original number
220 - 164 = 56
56 ÷ 164 = 0.34146341463414637
0.34146341463414637 x 100 = 34.15%