10% is the change from 180 to 198
Calculation steps:
[( 198 - 180 ) ÷ 180] x 100 = 10%
Formula
Percentage change = [(198 - 180) / 180] x 100
Subtract the new number by the original number
198 - 180 = 18
18 ÷ 180 = 0.1
0.1 x 100 = 10%
Example