-70.04% is the change from 721 to 216
Calculation steps:
[( 216 - 721 ) ÷ 721] x 100 = -70.04%
Formula
Percentage change = [(216 - 721) / 721] x 100
Subtract the new number by the original number
216 - 721 = -505
-505 ÷ 721 = -0.7004160887656034
-0.7004160887656034 x 100 = -70.04%