-49.65% is the change from 987 to 497
Calculation steps:
[( 497 - 987 ) ÷ 987] x 100 = -49.65%
Formula
Percentage change = [(497 - 987) / 987] x 100
Subtract the new number by the original number
497 - 987 = -490
-490 ÷ 987 = -0.49645390070921985
-0.49645390070921985 x 100 = -49.65%