Precalculus Examples

$1 - \frac{16}{81}$

Step 1

Write $1$ as a fraction with a common denominator.

$\frac{81}{81} - \frac{16}{81}$

Step 2

Combine the numerators over the common denominator.

$\frac{81 - 16}{81}$

Step 3

Subtract $16$ from $81$ .

$\frac{65}{81}$

Step 4

The result can be shown in multiple forms.

Exact Form:

$\frac{65}{81}$

Decimal Form:

$0.80246913 \dots$