-37.5% is the change from 144 to 90
Calculation steps:
[( 90 - 144 ) ÷ 144] x 100 = -37.5%
Formula
Percentage change = [(90 - 144) / 144] x 100
Subtract the new number by the original number
90 - 144 = -54
-54 ÷ 144 = -0.375
-0.375 x 100 = -37.5%
Example