-31.05% is the change from 963 to 664
Calculation steps:
[( 664 - 963 ) ÷ 963] x 100 = -31.05%
Formula
Percentage change = [(664 - 963) / 963] x 100
Subtract the new number by the original number
664 - 963 = -299
-299 ÷ 963 = -0.31048805815160957
-0.31048805815160957 x 100 = -31.05%