-31.86% is the change from 973 to 663
Calculation steps:
[( 663 - 973 ) ÷ 973] x 100 = -31.86%
Formula
Percentage change = [(663 - 973) / 973] x 100
Subtract the new number by the original number
663 - 973 = -310
-310 ÷ 973 = -0.3186022610483042
-0.3186022610483042 x 100 = -31.86%