-56.52% is the change from 621 to 270
Calculation steps:
[( 270 - 621 ) ÷ 621] x 100 = -56.52%
Formula
Percentage change = [(270 - 621) / 621] x 100
Subtract the new number by the original number
270 - 621 = -351
-351 ÷ 621 = -0.5652173913043478
-0.5652173913043478 x 100 = -56.52%