-77.1% is the change from 668 to 153
Calculation steps:
[( 153 - 668 ) ÷ 668] x 100 = -77.1%
Formula
Percentage change = [(153 - 668) / 668] x 100
Subtract the new number by the original number
153 - 668 = -515
-515 ÷ 668 = -0.7709580838323353
-0.7709580838323353 x 100 = -77.1%