-0.21% is the change from 970 to 968
Calculation steps:
[( 968 - 970 ) ÷ 970] x 100 = -0.21%
Formula
Percentage change = [(968 - 970) / 970] x 100
Subtract the new number by the original number
968 - 970 = -2
-2 ÷ 970 = -0.002061855670103093
-0.002061855670103093 x 100 = -0.21%