-15.31% is the change from 784 to 664
Calculation steps:
[( 664 - 784 ) ÷ 784] x 100 = -15.31%
Formula
Percentage change = [(664 - 784) / 784] x 100
Subtract the new number by the original number
664 - 784 = -120
-120 ÷ 784 = -0.15306122448979592
-0.15306122448979592 x 100 = -15.31%