Solve -21/3*7-32/4*8+5*9/45

$$- \frac { 21 } { 3 \cdot 7 } - \frac { 32 } { 4 \cdot 8 } + \frac { 5 \cdot 9 } { 45 }$$

Evaluate

$$-1$$

Solution Steps

Multiply 3 and 7 to get 21.

$$-\frac{21}{21}-\frac{32}{4\times 8}+\frac{5\times 9}{45}$$

Divide 21 by 21 to get 1.

$$-1-\frac{32}{4\times 8}+\frac{5\times 9}{45}$$

Multiply 4 and 8 to get 32.

$$-1-\frac{32}{32}+\frac{5\times 9}{45}$$

Divide 32 by 32 to get 1.

$$-1-1+\frac{5\times 9}{45}$$

Subtract 1 from -1 to get -2.

$$-2+\frac{5\times 9}{45}$$

Multiply 5 and 9 to get 45.

$$-2+\frac{45}{45}$$

Divide 45 by 45 to get 1.

$$-2+1$$

Add -2 and 1 to get -1.

$$-1$$

Factor

$$-1$$