-40.28% is the change from 849 to 507
Calculation steps:
[( 507 - 849 ) ÷ 849] x 100 = -40.28%
Formula
Percentage change = [(507 - 849) / 849] x 100
Subtract the new number by the original number
507 - 849 = -342
-342 ÷ 849 = -0.4028268551236749
-0.4028268551236749 x 100 = -40.28%