-68.04% is the change from 657 to 210
Calculation steps:
[( 210 - 657 ) ÷ 657] x 100 = -68.04%
Formula
Percentage change = [(210 - 657) / 657] x 100
Subtract the new number by the original number
210 - 657 = -447
-447 ÷ 657 = -0.680365296803653
-0.680365296803653 x 100 = -68.04%