-32.81% is the change from 963 to 647
Calculation steps:
[( 647 - 963 ) ÷ 963] x 100 = -32.81%
Formula
Percentage change = [(647 - 963) / 963] x 100
Subtract the new number by the original number
647 - 963 = -316
-316 ÷ 963 = -0.328141225337487
-0.328141225337487 x 100 = -32.81%