-66.51% is the change from 630 to 211
Calculation steps:
[( 211 - 630 ) ÷ 630] x 100 = -66.51%
Formula
Percentage change = [(211 - 630) / 630] x 100
Subtract the new number by the original number
211 - 630 = -419
-419 ÷ 630 = -0.665079365079365
-0.665079365079365 x 100 = -66.51%