-57.21% is the change from 631 to 270
Calculation steps:
[( 270 - 631 ) ÷ 631] x 100 = -57.21%
Formula
Percentage change = [(270 - 631) / 631] x 100
Subtract the new number by the original number
270 - 631 = -361
-361 ÷ 631 = -0.572107765451664
-0.572107765451664 x 100 = -57.21%