-55.07% is the change from 621 to 279
Calculation steps:
[( 279 - 621 ) ÷ 621] x 100 = -55.07%
Formula
Percentage change = [(279 - 621) / 621] x 100
Subtract the new number by the original number
279 - 621 = -342
-342 ÷ 621 = -0.5507246376811594
-0.5507246376811594 x 100 = -55.07%