-50.15% is the change from 975 to 486
Calculation steps:
[( 486 - 975 ) ÷ 975] x 100 = -50.15%
Formula
Percentage change = [(486 - 975) / 975] x 100
Subtract the new number by the original number
486 - 975 = -489
-489 ÷ 975 = -0.5015384615384615
-0.5015384615384615 x 100 = -50.15%