-47.63% is the change from 972 to 509
Calculation steps:
[( 509 - 972 ) ÷ 972] x 100 = -47.63%
Formula
Percentage change = [(509 - 972) / 972] x 100
Subtract the new number by the original number
509 - 972 = -463
-463 ÷ 972 = -0.4763374485596708
-0.4763374485596708 x 100 = -47.63%