-84.5% is the change from 271 to 42
Calculation steps:
[( 42 - 271 ) ÷ 271] x 100 = -84.5%
Formula
Percentage change = [(42 - 271) / 271] x 100
Subtract the new number by the original number
42 - 271 = -229
-229 ÷ 271 = -0.8450184501845018
-0.8450184501845018 x 100 = -84.5%