274.1% is the change from 139 to 520
Calculation steps:
[( 520 - 139 ) ÷ 139] x 100 = 274.1%
Formula
Percentage change = [(520 - 139) / 139] x 100
Subtract the new number by the original number
520 - 139 = 381
381 ÷ 139 = 2.741007194244604
2.741007194244604 x 100 = 274.1%