-48.1% is the change from 840 to 436
Calculation steps:
[( 436 - 840 ) ÷ 840] x 100 = -48.1%
Formula
Percentage change = [(436 - 840) / 840] x 100
Subtract the new number by the original number
436 - 840 = -404
-404 ÷ 840 = -0.48095238095238096
-0.48095238095238096 x 100 = -48.1%