What is 30 percent off of one hundred and forty four dollars?

$144 is equivalent to 100%.
So 30% off of $144 means that 70% of £144 remains.
144 x 70/100 = 100.80. . . so after taking 30% away from $144 then $100.80 remains.

Note 30% of $144 is 144 x 30/100 = 43.20