-73.66% is the change from 839 to 221
Calculation steps:
[( 221 - 839 ) ÷ 839] x 100 = -73.66%
Formula
Percentage change = [(221 - 839) / 839] x 100
Subtract the new number by the original number
221 - 839 = -618
-618 ÷ 839 = -0.7365911799761621
-0.7365911799761621 x 100 = -73.66%