54.68% is the change from 139 to 215
Calculation steps:
[( 215 - 139 ) ÷ 139] x 100 = 54.68%
Formula
Percentage change = [(215 - 139) / 139] x 100
Subtract the new number by the original number
215 - 139 = 76
76 ÷ 139 = 0.5467625899280576
0.5467625899280576 x 100 = 54.68%