52.29% is the change from 109 to 166
Calculation steps:
[( 166 - 109 ) ÷ 109] x 100 = 52.29%
Formula
Percentage change = [(166 - 109) / 109] x 100
Subtract the new number by the original number
166 - 109 = 57
57 ÷ 109 = 0.5229357798165137
0.5229357798165137 x 100 = 52.29%