1.01% is the change from 990 to 1000
Calculation steps:
[( 1000 - 990 ) ÷ 990] x 100 = 1.01%
Formula
Percentage change = [(1000 - 990) / 990] x 100
Subtract the new number by the original number
1000 - 990 = 10
10 ÷ 990 = 0.010101010101010102
0.010101010101010102 x 100 = 1.01%