# Chapter 3 - Adding and Subtracting Fractions - 3.3 Adding and Subtracting Unlike Fractions - 3.3 Exercises - Page 221: 43

$\frac{1}{24}$ of the tank remains.

#### Work Step by Step

$\frac{3}{4} - \frac{1}{3} - \frac{3}{8}$ Find the LCM using prime factorization. 4 = 2 x 2 3 = 3 8 = 2 x 2 x 2 LCM = 2 x 2 x 2 x 3 = 24 Express as like fractions then subtract. $\frac{3}{4} - \frac{1}{3} - \frac{3}{8}$ = $\frac{18}{24} - \frac{8}{24} - \frac{9}{24}$ = $\frac{1}{24}$

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