124.64% is the change from 138 to 310
Calculation steps:
[( 310 - 138 ) ÷ 138] x 100 = 124.64%
Formula
Percentage change = [(310 - 138) / 138] x 100
Subtract the new number by the original number
310 - 138 = 172
172 ÷ 138 = 1.2463768115942029
1.2463768115942029 x 100 = 124.64%