2.78% is the change from 970 to 997
Calculation steps:
[( 997 - 970 ) ÷ 970] x 100 = 2.78%
Formula
Percentage change = [(997 - 970) / 970] x 100
Subtract the new number by the original number
997 - 970 = 27
27 ÷ 970 = 0.027835051546391754
0.027835051546391754 x 100 = 2.78%