-18.2% is the change from 621 to 508
Calculation steps:
[( 508 - 621 ) ÷ 621] x 100 = -18.2%
Formula
Percentage change = [(508 - 621) / 621] x 100
Subtract the new number by the original number
508 - 621 = -113
-113 ÷ 621 = -0.1819645732689211
-0.1819645732689211 x 100 = -18.2%