73.08% is the change from 520 to 900
Calculation steps:
[( 900 - 520 ) ÷ 520] x 100 = 73.08%
Formula
Percentage change = [(900 - 520) / 520] x 100
Subtract the new number by the original number
900 - 520 = 380
380 ÷ 520 = 0.7307692307692307
0.7307692307692307 x 100 = 73.08%