Divide the number of times painted in the time it took.
To divide rewrite the numbers as improper fractions:
2 2/7 = 16/7
1 1/2 = 3/2
NoW set up the equation:
16/7 / 3/2
When you divide fractions flip the second number over and multiply:
16/7 x 2/3 = (16 x 2) / (7x3) = 32/21
Rewrite as a mikes number :
1 11/21 tiles per hour