-79.61% is the change from 206 to 42
Calculation steps:
[( 42 - 206 ) ÷ 206] x 100 = -79.61%
Formula
Percentage change = [(42 - 206) / 206] x 100
Subtract the new number by the original number
42 - 206 = -164
-164 ÷ 206 = -0.7961165048543689
-0.7961165048543689 x 100 = -79.61%