80% is the change from 10 to 18
Calculation steps:
[( 18 - 10 ) ÷ 10] x 100 = 80%
Formula
Percentage change = [(18 - 10) / 10] x 100
Subtract the new number by the original number
18 - 10 = 8
8 ÷ 10 = 0.8
0.8 x 100 = 80%
Example