84.89% is the change from 139 to 257
Calculation steps:
[( 257 - 139 ) ÷ 139] x 100 = 84.89%
Formula
Percentage change = [(257 - 139) / 139] x 100
Subtract the new number by the original number
257 - 139 = 118
118 ÷ 139 = 0.8489208633093526
0.8489208633093526 x 100 = 84.89%