Question

7/10 out of 90 times

Answer 1

Multiply 7/10 times 90 to find an estimate of the amount of times that he will reach the first base:

$\frac{7}{10}\times90=7\times\frac{90}{10}=7\times9=63$

Then, we can predict that he will reach first base 63 out of 90 times at bat.