-97.42% is the change from 271 to 7
Calculation steps:
[( 7 - 271 ) ÷ 271] x 100 = -97.42%
Formula
Percentage change = [(7 - 271) / 271] x 100
Subtract the new number by the original number
7 - 271 = -264
-264 ÷ 271 = -0.974169741697417
-0.974169741697417 x 100 = -97.42%