-79.59% is the change from 49 to 10
Calculation steps:
[( 10 - 49 ) ÷ 49] x 100 = -79.59%
Formula
Percentage change = [(10 - 49) / 49] x 100
Subtract the new number by the original number
10 - 49 = -39
-39 ÷ 49 = -0.7959183673469388
-0.7959183673469388 x 100 = -79.59%