-3.04% is the change from 987 to 957
Calculation steps:
[( 957 - 987 ) ÷ 987] x 100 = -3.04%
Formula
Percentage change = [(957 - 987) / 987] x 100
Subtract the new number by the original number
957 - 987 = -30
-30 ÷ 987 = -0.030395136778115502
-0.030395136778115502 x 100 = -3.04%