-84.93% is the change from 670 to 101
Calculation steps:
[( 101 - 670 ) ÷ 670] x 100 = -84.93%
Formula
Percentage change = [(101 - 670) / 670] x 100
Subtract the new number by the original number
101 - 670 = -569
-569 ÷ 670 = -0.8492537313432836
-0.8492537313432836 x 100 = -84.93%