-31.15% is the change from 61 to 42
Calculation steps:
[( 42 - 61 ) ÷ 61] x 100 = -31.15%
Formula
Percentage change = [(42 - 61) / 61] x 100
Subtract the new number by the original number
42 - 61 = -19
-19 ÷ 61 = -0.3114754098360656
-0.3114754098360656 x 100 = -31.15%