Pre-Algebra Examples

$20 \div 90$

Step 1

To convert from slope to percent grade, multiply the slope by a hundred.

$20 \div 90 = 20 \div 90 \cdot 100$

Step 2

Rewrite the division as a fraction.

$\frac{20}{90} \cdot 100 %$

Step 3

Cancel the common factor of $10$ .

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Step 3.1

Factor $10$ out of $90$ .

$\frac{20}{10 (9)} \cdot 100 %$

Step 3.2

Factor $10$ out of $100$ .

$\frac{20}{10 \cdot 9} \cdot 10 \cdot 10 %$

Step 3.3

Cancel the common factor.

$\frac{20}{10 \cdot 9} \cdot 10 \cdot 10 %$

Step 3.4

Rewrite the expression.

$\frac{20}{9} \cdot 10 %$

Step 4

Combine $\frac{20}{9}$ and $10$ .

$\frac{20 \cdot 10}{9 %}$

Step 5

Multiply $20$ by $10$ .

$\frac{200}{9 %}$