-1.2% is the change from 1000 to 988
Calculation steps:
[( 988 - 1000 ) ÷ 1000] x 100 = -1.2%
Formula
Percentage change = [(988 - 1000) / 1000] x 100
Subtract the new number by the original number
988 - 1000 = -12
-12 ÷ 1000 = -0.012
-0.012 x 100 = -1.2%