-61.82% is the change from 825 to 315
Calculation steps:
[( 315 - 825 ) ÷ 825] x 100 = -61.82%
Formula
Percentage change = [(315 - 825) / 825] x 100
Subtract the new number by the original number
315 - 825 = -510
-510 ÷ 825 = -0.6181818181818182
-0.6181818181818182 x 100 = -61.82%