-92.73% is the change from 839 to 61
Calculation steps:
[( 61 - 839 ) ÷ 839] x 100 = -92.73%
Formula
Percentage change = [(61 - 839) / 839] x 100
Subtract the new number by the original number
61 - 839 = -778
-778 ÷ 839 = -0.9272943980929678
-0.9272943980929678 x 100 = -92.73%