-0.21% is the change from 972 to 970
Calculation steps:
[( 970 - 972 ) ÷ 972] x 100 = -0.21%
Formula
Percentage change = [(970 - 972) / 972] x 100
Subtract the new number by the original number
970 - 972 = -2
-2 ÷ 972 = -0.00205761316872428
-0.00205761316872428 x 100 = -0.21%