-50% is the change from 974 to 487
Calculation steps:
[( 487 - 974 ) ÷ 974] x 100 = -50%
Formula
Percentage change = [(487 - 974) / 974] x 100
Subtract the new number by the original number
487 - 974 = -487
-487 ÷ 974 = -0.5
-0.5 x 100 = -50%
Example