75% is the change from 520 to 910
Calculation steps:
[( 910 - 520 ) ÷ 520] x 100 = 75%
Formula
Percentage change = [(910 - 520) / 520] x 100
Subtract the new number by the original number
910 - 520 = 390
390 ÷ 520 = 0.75
0.75 x 100 = 75%
Example