-77.84% is the change from 668 to 148
Calculation steps:
[( 148 - 668 ) ÷ 668] x 100 = -77.84%
Formula
Percentage change = [(148 - 668) / 668] x 100
Subtract the new number by the original number
148 - 668 = -520
-520 ÷ 668 = -0.7784431137724551
-0.7784431137724551 x 100 = -77.84%