-39.67% is the change from 842 to 508
Calculation steps:
[( 508 - 842 ) ÷ 842] x 100 = -39.67%
Formula
Percentage change = [(508 - 842) / 842] x 100
Subtract the new number by the original number
508 - 842 = -334
-334 ÷ 842 = -0.39667458432304037
-0.39667458432304037 x 100 = -39.67%