Answer:
He used [tex]1\frac{7}{8}\ lb[/tex]
Step-by-step explanation:
Given
[tex]Total = 3\ lb[/tex]
[tex]Fraction = \frac{5}{8}[/tex] to make sauce
Required
Determine the number of pounds used
To solve this, we simply multiply the fraction of tomato used by the total;
[tex]Used = Fraction * Total[/tex]
[tex]Used = \frac{5}{8} * 3\ lb[/tex]
[tex]Used = \frac{5 * 3}{8}\ lb[/tex]
[tex]Used = \frac{15}{8}\ lb[/tex]
Convert to mixed number
[tex]Used = 1\frac{7}{8}\ lb[/tex]
Hence,
He used [tex]1\frac{7}{8}\ lb[/tex] out of the 3lb he bought