-49.09% is the change from 992 to 505
Calculation steps:
[( 505 - 992 ) ÷ 992] x 100 = -49.09%
Formula
Percentage change = [(505 - 992) / 992] x 100
Subtract the new number by the original number
505 - 992 = -487
-487 ÷ 992 = -0.4909274193548387
-0.4909274193548387 x 100 = -49.09%