To solve this, all you need to do is multiply 16 by 3/8. When you multiply a whole number by a fraction, make the whole number into a fraction by putting it over 1.
16 3
---- x ---- Multiply the numerators together and then the denominators.
1 8
(16 x 3) / (1 x 8)
48 / 8 Then divide.
She used 6 inches of tape.