-67.66% is the change from 671 to 217
Calculation steps:
[( 217 - 671 ) ÷ 671] x 100 = -67.66%
Formula
Percentage change = [(217 - 671) / 671] x 100
Subtract the new number by the original number
217 - 671 = -454
-454 ÷ 671 = -0.676602086438152
-0.676602086438152 x 100 = -67.66%