106.45% is the change from 155 to 320
Calculation steps:
[( 320 - 155 ) ÷ 155] x 100 = 106.45%
Formula
Percentage change = [(320 - 155) / 155] x 100
Subtract the new number by the original number
320 - 155 = 165
165 ÷ 155 = 1.064516129032258
1.064516129032258 x 100 = 106.45%