-7.75% is the change from 271 to 250
Calculation steps:
[( 250 - 271 ) ÷ 271] x 100 = -7.75%
Formula
Percentage change = [(250 - 271) / 271] x 100
Subtract the new number by the original number
250 - 271 = -21
-21 ÷ 271 = -0.07749077490774908
-0.07749077490774908 x 100 = -7.75%