Basic Math Examples

$\frac{1}{5} - \frac{1}{20}$

Step 1

To write $\frac{1}{5}$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$\frac{1}{5} \cdot \frac{4}{4} - \frac{1}{20}$

Step 2

Write each expression with a common denominator of $20$ , by multiplying each by an appropriate factor of $1$ .

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Step 2.1

Multiply $\frac{1}{5}$ by $\frac{4}{4}$ .

$\frac{4}{5 \cdot 4} - \frac{1}{20}$

Step 2.2

Multiply $5$ by $4$ .

$\frac{4}{20} - \frac{1}{20}$

Step 3

Combine the numerators over the common denominator.

$\frac{4 - 1}{20}$

Step 4

Subtract $1$ from $4$ .

$\frac{3}{20}$

Step 5

The result can be shown in multiple forms.

Exact Form:

$\frac{3}{20}$

Decimal Form:

$0.15$