-20.66% is the change from 271 to 215
Calculation steps:
[( 215 - 271 ) ÷ 271] x 100 = -20.66%
Formula
Percentage change = [(215 - 271) / 271] x 100
Subtract the new number by the original number
215 - 271 = -56
-56 ÷ 271 = -0.2066420664206642
-0.2066420664206642 x 100 = -20.66%