Solve 21div8+2-12*3=

$$21 \div 8 + 2 - 12 \times 3 =$$

Evaluate

$$-\frac{251}{8}=-31.375$$

Solution Steps

Convert 2 to fraction \frac{16}{8}.

$$\frac{21}{8}+\frac{16}{8}-12\times 3$$

Since \frac{21}{8} and \frac{16}{8} have the same denominator, add them by adding their numerators.

$$\frac{21+16}{8}-12\times 3$$

Add 21 and 16 to get 37.

$$\frac{37}{8}-12\times 3$$

Multiply 12 and 3 to get 36.

$$\frac{37}{8}-36$$

Convert 36 to fraction \frac{288}{8}.

$$\frac{37}{8}-\frac{288}{8}$$

Since \frac{37}{8} and \frac{288}{8} have the same denominator, subtract them by subtracting their numerators.

$$\frac{37-288}{8}$$

Subtract 288 from 37 to get -251.

$$-\frac{251}{8}$$

Factor

$$-\frac{251}{8} = -31\frac{3}{8} = -31.375$$