19.5% is the change from 436 to 521
Calculation steps:
[( 521 - 436 ) ÷ 436] x 100 = 19.5%
Formula
Percentage change = [(521 - 436) / 436] x 100
Subtract the new number by the original number
521 - 436 = 85
85 ÷ 436 = 0.19495412844036697
0.19495412844036697 x 100 = 19.5%