-41.9% is the change from 840 to 488
Calculation steps:
[( 488 - 840 ) ÷ 840] x 100 = -41.9%
Formula
Percentage change = [(488 - 840) / 840] x 100
Subtract the new number by the original number
488 - 840 = -352
-352 ÷ 840 = -0.41904761904761906
-0.41904761904761906 x 100 = -41.9%