-82.72% is the change from 243 to 42
Calculation steps:
[( 42 - 243 ) ÷ 243] x 100 = -82.72%
Formula
Percentage change = [(42 - 243) / 243] x 100
Subtract the new number by the original number
42 - 243 = -201
-201 ÷ 243 = -0.8271604938271605
-0.8271604938271605 x 100 = -82.72%