-79.86% is the change from 690 to 139
Calculation steps:
[( 139 - 690 ) ÷ 690] x 100 = -79.86%
Formula
Percentage change = [(139 - 690) / 690] x 100
Subtract the new number by the original number
139 - 690 = -551
-551 ÷ 690 = -0.7985507246376812
-0.7985507246376812 x 100 = -79.86%