-74.19% is the change from 833 to 215
Calculation steps:
[( 215 - 833 ) ÷ 833] x 100 = -74.19%
Formula
Percentage change = [(215 - 833) / 833] x 100
Subtract the new number by the original number
215 - 833 = -618
-618 ÷ 833 = -0.7418967587034814
-0.7418967587034814 x 100 = -74.19%