Answer:
6.5
Explanation:
Simplify the fractions if possible. For example, 90/7 can be simplified to 12 6/7 by dividing both the numerator and denominator by 7.
Round the fractions to the nearest half or whole number. For example, 12 6/7 can be rounded to 13, and 1 3/4 can be rounded to 2.
Divide the rounded fractions. For example, 13 divided by 2 is 6.5.
Therefore, the best estimate of 90/7 divided by 1 3/4 is 6.5.