-47.79% is the change from 975 to 509
Calculation steps:
[( 509 - 975 ) ÷ 975] x 100 = -47.79%
Formula
Percentage change = [(509 - 975) / 975] x 100
Subtract the new number by the original number
509 - 975 = -466
-466 ÷ 975 = -0.47794871794871796
-0.47794871794871796 x 100 = -47.79%