-77.95% is the change from 839 to 185
Calculation steps:
[( 185 - 839 ) ÷ 839] x 100 = -77.95%
Formula
Percentage change = [(185 - 839) / 839] x 100
Subtract the new number by the original number
185 - 839 = -654
-654 ÷ 839 = -0.7794994040524433
-0.7794994040524433 x 100 = -77.95%