-80.95% is the change from 42 to 8
Calculation steps:
[( 8 - 42 ) ÷ 42] x 100 = -80.95%
Formula
Percentage change = [(8 - 42) / 42] x 100
Subtract the new number by the original number
8 - 42 = -34
-34 ÷ 42 = -0.8095238095238095
-0.8095238095238095 x 100 = -80.95%