-73.47% is the change from 833 to 221
Calculation steps:
[( 221 - 833 ) ÷ 833] x 100 = -73.47%
Formula
Percentage change = [(221 - 833) / 833] x 100
Subtract the new number by the original number
221 - 833 = -612
-612 ÷ 833 = -0.7346938775510204
-0.7346938775510204 x 100 = -73.47%