-34.3% is the change from 621 to 408
Calculation steps:
[( 408 - 621 ) ÷ 621] x 100 = -34.3%
Formula
Percentage change = [(408 - 621) / 621] x 100
Subtract the new number by the original number
408 - 621 = -213
-213 ÷ 621 = -0.34299516908212563
-0.34299516908212563 x 100 = -34.3%