2.06% is the change from 970 to 990
Calculation steps:
[( 990 - 970 ) ÷ 970] x 100 = 2.06%
Formula
Percentage change = [(990 - 970) / 970] x 100
Subtract the new number by the original number
990 - 970 = 20
20 ÷ 970 = 0.020618556701030927
0.020618556701030927 x 100 = 2.06%