-32.83% is the change from 987 to 663
Calculation steps:
[( 663 - 987 ) ÷ 987] x 100 = -32.83%
Formula
Percentage change = [(663 - 987) / 987] x 100
Subtract the new number by the original number
663 - 987 = -324
-324 ÷ 987 = -0.3282674772036474
-0.3282674772036474 x 100 = -32.83%