-15.5% is the change from 987 to 834
Calculation steps:
[( 834 - 987 ) ÷ 987] x 100 = -15.5%
Formula
Percentage change = [(834 - 987) / 987] x 100
Subtract the new number by the original number
834 - 987 = -153
-153 ÷ 987 = -0.15501519756838905
-0.15501519756838905 x 100 = -15.5%