-29.01% is the change from 934 to 663
Calculation steps:
[( 663 - 934 ) ÷ 934] x 100 = -29.01%
Formula
Percentage change = [(663 - 934) / 934] x 100
Subtract the new number by the original number
663 - 934 = -271
-271 ÷ 934 = -0.29014989293361887
-0.29014989293361887 x 100 = -29.01%
Example