-58.62% is the change from 621 to 257
Calculation steps:
[( 257 - 621 ) ÷ 621] x 100 = -58.62%
Formula
Percentage change = [(257 - 621) / 621] x 100
Subtract the new number by the original number
257 - 621 = -364
-364 ÷ 621 = -0.5861513687600645
-0.5861513687600645 x 100 = -58.62%