-77.94% is the change from 680 to 150
Calculation steps:
[( 150 - 680 ) ÷ 680] x 100 = -77.94%
Formula
Percentage change = [(150 - 680) / 680] x 100
Subtract the new number by the original number
150 - 680 = -530
-530 ÷ 680 = -0.7794117647058824
-0.7794117647058824 x 100 = -77.94%