-57.14% is the change from 630 to 270
Calculation steps:
[( 270 - 630 ) ÷ 630] x 100 = -57.14%
Formula
Percentage change = [(270 - 630) / 630] x 100
Subtract the new number by the original number
270 - 630 = -360
-360 ÷ 630 = -0.5714285714285714
-0.5714285714285714 x 100 = -57.14%