-73.65% is the change from 831 to 219
Calculation steps:
[( 219 - 831 ) ÷ 831] x 100 = -73.65%
Formula
Percentage change = [(219 - 831) / 831] x 100
Subtract the new number by the original number
219 - 831 = -612
-612 ÷ 831 = -0.7364620938628159
-0.7364620938628159 x 100 = -73.65%