-48.48% is the change from 988 to 509
Calculation steps:
[( 509 - 988 ) ÷ 988] x 100 = -48.48%
Formula
Percentage change = [(509 - 988) / 988] x 100
Subtract the new number by the original number
509 - 988 = -479
-479 ÷ 988 = -0.4848178137651822
-0.4848178137651822 x 100 = -48.48%