20% is the change from 600 to 720
Calculation steps:
[( 720 - 600 ) ÷ 600] x 100 = 20%
Formula
Percentage change = [(720 - 600) / 600] x 100
Subtract the new number by the original number
720 - 600 = 120
120 ÷ 600 = 0.2
0.2 x 100 = 20%
Example