30% is the change from 10 to 13
Calculation steps:
[( 13 - 10 ) ÷ 10] x 100 = 30%
Formula
Percentage change = [(13 - 10) / 10] x 100
Subtract the new number by the original number
13 - 10 = 3
3 ÷ 10 = 0.3
0.3 x 100 = 30%
Example