Answer:
7 pieces
Step-by-step explanation:
step 1
we know that
To find out how many more pieces of string are needed, divide the total length of the piece of string by 3/8 and the result subtract from 20 pieces
[tex]4\frac{7}{8} : \frac{3}{8}[/tex]
step 2
Convert mixed number to an improper fraction
[tex]4\frac{7}{8}\ in=4+\frac{7}{8}=\frac{4*8+7}{8}=\frac{39}{8}\ in[/tex]
step 3
[tex]\frac{39}{8} : \frac{3}{8}=13\ pieces[/tex]
step 4
[tex]20-13=7\ pieces[/tex]
