-3.07% is the change from 977 to 947
Calculation steps:
[( 947 - 977 ) ÷ 977] x 100 = -3.07%
Formula
Percentage change = [(947 - 977) / 977] x 100
Subtract the new number by the original number
947 - 977 = -30
-30 ÷ 977 = -0.030706243602865915
-0.030706243602865915 x 100 = -3.07%