-75% is the change from 600 to 150
Calculation steps:
[( 150 - 600 ) ÷ 600] x 100 = -75%
Formula
Percentage change = [(150 - 600) / 600] x 100
Subtract the new number by the original number
150 - 600 = -450
-450 ÷ 600 = -0.75
-0.75 x 100 = -75%
Example