Evaluate 3/4+4/5

$\frac{3}{4} + \frac{4}{5}$

To write $\frac{3}{4}$ as a fraction with a common denominator, multiply by $\frac{5}{5}$ .

$\frac{3}{4} \cdot \frac{5}{5} + \frac{4}{5}$

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

$\frac{3}{4} \cdot \frac{5}{5} + \frac{4}{5} \cdot \frac{4}{4}$

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

Multiply $\frac{3}{4}$ by $\frac{5}{5}$ .

$\frac{3 \cdot 5}{4 \cdot 5} + \frac{4}{5} \cdot \frac{4}{4}$

Multiply $4$ by $5$ .

$\frac{3 \cdot 5}{20} + \frac{4}{5} \cdot \frac{4}{4}$

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

$\frac{3 \cdot 5}{20} + \frac{4 \cdot 4}{5 \cdot 4}$

Multiply $5$ by $4$ .

$\frac{3 \cdot 5}{20} + \frac{4 \cdot 4}{20}$

Combine the numerators over the common denominator.

$\frac{3 \cdot 5 + 4 \cdot 4}{20}$

Simplify the numerator.

Multiply $3$ by $5$ .

$\frac{15 + 4 \cdot 4}{20}$

Multiply $4$ by $4$ .

$\frac{15 + 16}{20}$

Add $15$ and $16$ .

$\frac{31}{20}$

The result can be shown in multiple forms.

Exact Form:

$\frac{31}{20}$

Decimal Form:

$1.55$

Mixed Number Form:

$1 \frac{11}{20}$