-65.38% is the change from 621 to 215
Calculation steps:
[( 215 - 621 ) ÷ 621] x 100 = -65.38%
Formula
Percentage change = [(215 - 621) / 621] x 100
Subtract the new number by the original number
215 - 621 = -406
-406 ÷ 621 = -0.6537842190016103
-0.6537842190016103 x 100 = -65.38%