-61.88% is the change from 821 to 313
Calculation steps:
[( 313 - 821 ) ÷ 821] x 100 = -61.88%
Formula
Percentage change = [(313 - 821) / 821] x 100
Subtract the new number by the original number
313 - 821 = -508
-508 ÷ 821 = -0.6187576126674786
-0.6187576126674786 x 100 = -61.88%