38.2% is the change from 521 to 720
Calculation steps:
[( 720 - 521 ) ÷ 521] x 100 = 38.2%
Formula
Percentage change = [(720 - 521) / 521] x 100
Subtract the new number by the original number
720 - 521 = 199
199 ÷ 521 = 0.381957773512476
0.381957773512476 x 100 = 38.2%