-42.02% is the change from 840 to 487
Calculation steps:
[( 487 - 840 ) ÷ 840] x 100 = -42.02%
Formula
Percentage change = [(487 - 840) / 840] x 100
Subtract the new number by the original number
487 - 840 = -353
-353 ÷ 840 = -0.42023809523809524
-0.42023809523809524 x 100 = -42.02%