Add up the weight of all the watermelons:
[tex]8 \frac{1}{4} + 9 \frac{1}{4} + 8 \frac{7}{8} + 9 \frac{5}{8} + 10 \frac{3}{4 } = 46 \frac{3}{4} pounds[/tex]
then multiply 153 with 1/4 to know how much was eaten:
153*1/4 =
[tex]153 \times \frac{1}{4} = 38 \frac{1}{4} [/tex]
Then subtract the amount that was eaten of the amount watermelons that there where
[tex]46 \frac{3}{4} - 38 \frac{1}{4} = 8 \frac{1}{2} [/tex]
there was precisely 8 1/2 pounds left over
