Solve 12/3*21/4

$$1 \frac { 2 } { 3 } \times 2 \frac { 1 } { 4 }$$

Evaluate

$$\frac{15}{4}=3.75$$

Solution Steps

Multiply 1 and 3 to get 3.

$$\frac{3+2}{3}\times \frac{2\times 4+1}{4}$$

Add 3 and 2 to get 5.

$$\frac{5}{3}\times \frac{2\times 4+1}{4}$$

Multiply 2 and 4 to get 8.

$$\frac{5}{3}\times \frac{8+1}{4}$$

Add 8 and 1 to get 9.

$$\frac{5}{3}\times \frac{9}{4}$$

Multiply \frac{5}{3} times \frac{9}{4} by multiplying numerator times numerator and denominator times denominator.

$$\frac{5\times 9}{3\times 4}$$

Do the multiplications in the fraction \frac{5\times 9}{3\times 4}.

$$\frac{45}{12}$$

Reduce the fraction \frac{45}{12} to lowest terms by extracting and canceling out 3.

$$\frac{15}{4}$$

Factor

$$\frac{3 \cdot 5}{2 ^ {2}} = 3\frac{3}{4} = 3.75$$