-48.85% is the change from 997 to 510
Calculation steps:
[( 510 - 997 ) ÷ 997] x 100 = -48.85%
Formula
Percentage change = [(510 - 997) / 997] x 100
Subtract the new number by the original number
510 - 997 = -487
-487 ÷ 997 = -0.4884653961885657
-0.4884653961885657 x 100 = -48.85%