-68.7% is the change from 671 to 210
Calculation steps:
[( 210 - 671 ) ÷ 671] x 100 = -68.7%
Formula
Percentage change = [(210 - 671) / 671] x 100
Subtract the new number by the original number
210 - 671 = -461
-461 ÷ 671 = -0.6870342771982116
-0.6870342771982116 x 100 = -68.7%