-6.48% is the change from 972 to 909
Calculation steps:
[( 909 - 972 ) ÷ 972] x 100 = -6.48%
Formula
Percentage change = [(909 - 972) / 972] x 100
Subtract the new number by the original number
909 - 972 = -63
-63 ÷ 972 = -0.06481481481481481
-0.06481481481481481 x 100 = -6.48%