-78.77% is the change from 669 to 142
Calculation steps:
[( 142 - 669 ) ÷ 669] x 100 = -78.77%
Formula
Percentage change = [(142 - 669) / 669] x 100
Subtract the new number by the original number
142 - 669 = -527
-527 ÷ 669 = -0.7877428998505231
-0.7877428998505231 x 100 = -78.77%