3.98% is the change from 502 to 522
Calculation steps:
[( 522 - 502 ) ÷ 502] x 100 = 3.98%
Formula
Percentage change = [(522 - 502) / 502] x 100
Subtract the new number by the original number
522 - 502 = 20
20 ÷ 502 = 0.0398406374501992
0.0398406374501992 x 100 = 3.98%