-67.28% is the change from 217 to 71
Calculation steps:
[( 71 - 217 ) ÷ 217] x 100 = -67.28%
Formula
Percentage change = [(71 - 217) / 217] x 100
Subtract the new number by the original number
71 - 217 = -146
-146 ÷ 217 = -0.6728110599078341
-0.6728110599078341 x 100 = -67.28%