-19.33% is the change from 150 to 121
Calculation steps:
[( 121 - 150 ) ÷ 150] x 100 = -19.33%
Formula
Percentage change = [(121 - 150) / 150] x 100
Subtract the new number by the original number
121 - 150 = -29
-29 ÷ 150 = -0.19333333333333333
-0.19333333333333333 x 100 = -19.33%