Question

There are 81 new houses being built in a neighborhood. Last month, 1 over 3
of them were sold. This month, 2 over 3 of the remaining houses were sold. How many houses are left to be sold?

Answer 1

81 houses total.

$\frac{1}{3}$ of 81 (27) sold last month.

81 - 27 = 54 houses remaining.

$\frac{2}{3}$ of 54 (36) sold this month.

54 - 36 = 18 houses remaining.

There are 18 houses left to be sold.