-51.96% is the change from 662 to 318
Calculation steps:
[( 318 - 662 ) ÷ 662] x 100 = -51.96%
Formula
Percentage change = [(318 - 662) / 662] x 100
Subtract the new number by the original number
318 - 662 = -344
-344 ÷ 662 = -0.5196374622356495
-0.5196374622356495 x 100 = -51.96%