-6.69% is the change from 987 to 921
Calculation steps:
[( 921 - 987 ) ÷ 987] x 100 = -6.69%
Formula
Percentage change = [(921 - 987) / 987] x 100
Subtract the new number by the original number
921 - 987 = -66
-66 ÷ 987 = -0.0668693009118541
-0.0668693009118541 x 100 = -6.69%