35% is the change from 20 to 27
Calculation steps:
[( 27 - 20 ) ÷ 20] x 100 = 35%
Formula
Percentage change = [(27 - 20) / 20] x 100
Subtract the new number by the original number
27 - 20 = 7
7 ÷ 20 = 0.35
0.35 x 100 = 35%
Example