-39.9% is the change from 970 to 583
Calculation steps:
[( 583 - 970 ) ÷ 970] x 100 = -39.9%
Formula
Percentage change = [(583 - 970) / 970] x 100
Subtract the new number by the original number
583 - 970 = -387
-387 ÷ 970 = -0.3989690721649485
-0.3989690721649485 x 100 = -39.9%