-78.81% is the change from 670 to 142
Calculation steps:
[( 142 - 670 ) ÷ 670] x 100 = -78.81%
Formula
Percentage change = [(142 - 670) / 670] x 100
Subtract the new number by the original number
142 - 670 = -528
-528 ÷ 670 = -0.7880597014925373
-0.7880597014925373 x 100 = -78.81%