-37.68% is the change from 621 to 387
Calculation steps:
[( 387 - 621 ) ÷ 621] x 100 = -37.68%
Formula
Percentage change = [(387 - 621) / 621] x 100
Subtract the new number by the original number
387 - 621 = -234
-234 ÷ 621 = -0.37681159420289856
-0.37681159420289856 x 100 = -37.68%