Solve -21/5*-13/4

$$- 2 \frac { 1 } { 5 } \cdot - 1 \frac { 3 } { 4 }$$

Evaluate

$$\frac{77}{20}=3.85$$

Solution Steps

Multiply 2 and 5 to get 10.

$$\left(-\frac{10+1}{5}\right)\left(-\frac{1\times 4+3}{4}\right)$$

Add 10 and 1 to get 11.

$$-\frac{11}{5}\left(-\frac{4+3}{4}\right)$$

Add 4 and 3 to get 7.

$$-\frac{11}{5}\left(-\frac{7}{4}\right)$$

Multiply -\frac{11}{5} times -\frac{7}{4} by multiplying numerator times numerator and denominator times denominator.

$$\frac{-11\left(-7\right)}{5\times 4}$$

Do the multiplications in the fraction \frac{-11\left(-7\right)}{5\times 4}.

$$\frac{77}{20}$$

Factor

$$\frac{7 \cdot 11}{2 ^ {2} \cdot 5} = 3\frac{17}{20} = 3.85$$