-1.3% is the change from 1000 to 987
Calculation steps:
[( 987 - 1000 ) ÷ 1000] x 100 = -1.3%
Formula
Percentage change = [(987 - 1000) / 1000] x 100
Subtract the new number by the original number
987 - 1000 = -13
-13 ÷ 1000 = -0.013
-0.013 x 100 = -1.3%