-61.69% is the change from 817 to 313
Calculation steps:
[( 313 - 817 ) ÷ 817] x 100 = -61.69%
Formula
Percentage change = [(313 - 817) / 817] x 100
Subtract the new number by the original number
313 - 817 = -504
-504 ÷ 817 = -0.616891064871481
-0.616891064871481 x 100 = -61.69%