74.86% is the change from 521 to 911
Calculation steps:
[( 911 - 521 ) ÷ 521] x 100 = 74.86%
Formula
Percentage change = [(911 - 521) / 521] x 100
Subtract the new number by the original number
911 - 521 = 390
390 ÷ 521 = 0.7485604606525912
0.7485604606525912 x 100 = 74.86%