37.24% is the change from 521 to 715
Calculation steps:
[( 715 - 521 ) ÷ 521] x 100 = 37.24%
Formula
Percentage change = [(715 - 521) / 521] x 100
Subtract the new number by the original number
715 - 521 = 194
194 ÷ 521 = 0.3723608445297505
0.3723608445297505 x 100 = 37.24%