20% is the change from 10 to 12
Calculation steps:
[( 12 - 10 ) ÷ 10] x 100 = 20%
Formula
Percentage change = [(12 - 10) / 10] x 100
Subtract the new number by the original number
12 - 10 = 2
2 ÷ 10 = 0.2
0.2 x 100 = 20%
Example