-47.53% is the change from 970 to 509
Calculation steps:
[( 509 - 970 ) ÷ 970] x 100 = -47.53%
Formula
Percentage change = [(509 - 970) / 970] x 100
Subtract the new number by the original number
509 - 970 = -461
-461 ÷ 970 = -0.47525773195876286
-0.47525773195876286 x 100 = -47.53%