-21.88% is the change from 987 to 771
Calculation steps:
[( 771 - 987 ) ÷ 987] x 100 = -21.88%
Formula
Percentage change = [(771 - 987) / 987] x 100
Subtract the new number by the original number
771 - 987 = -216
-216 ÷ 987 = -0.2188449848024316
-0.2188449848024316 x 100 = -21.88%