Basic Math Examples

write

15.4

$15.4$ as a fraction

Step 1

Convert the decimal number to a fraction by placing the decimal number over a power of ten. Since there is

1

$1$ number to the right of the decimal point, place the decimal number over

10^{1}

$10^{1}$

(10)

$(10)$ . Next, add the whole number to the left of the decimal.

15 \frac{4}{10}

$15 \frac{4}{10}$

Step 2

Reduce the fractional part of the mixed number.

15 \frac{2}{5}

$15 \frac{2}{5}$

Step 3

Convert

15 \frac{2}{5}

$15 \frac{2}{5}$ to an improper fraction.

Tap for more steps...

Step 3.1

A mixed number is an addition of its whole and fractional parts.

15 + \frac{2}{5}

$15 + \frac{2}{5}$

Step 3.2

Add

15

$15$ and

\frac{2}{5}

$\frac{2}{5}$ .

Tap for more steps...

Step 3.2.1

To write

15

$15$ as a fraction with a common denominator, multiply by

\frac{5}{5}

$\frac{5}{5}$ .

15 \cdot \frac{5}{5} + \frac{2}{5}

$15 \cdot \frac{5}{5} + \frac{2}{5}$

Step 3.2.2

Combine

15

$15$ and

\frac{5}{5}

$\frac{5}{5}$ .

\frac{15 \cdot 5}{5} + \frac{2}{5}

$\frac{15 \cdot 5}{5} + \frac{2}{5}$

Step 3.2.3

Combine the numerators over the common denominator.

\frac{15 \cdot 5 + 2}{5}

$\frac{15 \cdot 5 + 2}{5}$

Step 3.2.4

Simplify the numerator.

Tap for more steps...

Step 3.2.4.1

Multiply

15

$15$ by

5

$5$ .

\frac{75 + 2}{5}

$\frac{75 + 2}{5}$

Step 3.2.4.2

Add

75

$75$ and

2

$2$ .

\frac{77}{5}

$\frac{77}{5}$

\frac{77}{5}

$\frac{77}{5}$

\frac{77}{5}

$\frac{77}{5}$

\frac{77}{5}

$\frac{77}{5}$