Question

Convert each mixed number to an improper fraction and solve by subtracting use the LCD

Answer 1

To solve is:

$1 \frac{1}{4} - 1 \frac{1}{5}$

making it into an improper fraction:

$\frac{1+4}{4} - \frac{1+5}{5}$


$\frac{5}{4} - \frac{6}{5}$

bringing to a common denominator (which is 20, since they have no factors in common)

$\frac{5*5}{20} - \frac{6*4}{20}$


$\frac{25}{20} - \frac{24}{20}$

the answer is then:
$\frac{1}{20}$