-77.71% is the change from 839 to 187
Calculation steps:
[( 187 - 839 ) ÷ 839] x 100 = -77.71%
Formula
Percentage change = [(187 - 839) / 839] x 100
Subtract the new number by the original number
187 - 839 = -652
-652 ÷ 839 = -0.7771156138259833
-0.7771156138259833 x 100 = -77.71%