-66.82% is the change from 648 to 215
Calculation steps:
[( 215 - 648 ) ÷ 648] x 100 = -66.82%
Formula
Percentage change = [(215 - 648) / 648] x 100
Subtract the new number by the original number
215 - 648 = -433
-433 ÷ 648 = -0.6682098765432098
-0.6682098765432098 x 100 = -66.82%