-90.57% is the change from 509 to 48
Calculation steps:
[( 48 - 509 ) ÷ 509] x 100 = -90.57%
Formula
Percentage change = [(48 - 509) / 509] x 100
Subtract the new number by the original number
48 - 509 = -461
-461 ÷ 509 = -0.9056974459724951
-0.9056974459724951 x 100 = -90.57%