-49.9% is the change from 970 to 486
Calculation steps:
[( 486 - 970 ) ÷ 970] x 100 = -49.9%
Formula
Percentage change = [(486 - 970) / 970] x 100
Subtract the new number by the original number
486 - 970 = -484
-484 ÷ 970 = -0.49896907216494846
-0.49896907216494846 x 100 = -49.9%