The gross profit margin is calculated using the formula:
\[ \text{Gross Profit Margin} = \left( \frac{\text{Gross Profit}}{\text{Sales Revenue}} \right) \times 100 \]
Given:
- Sales Revenue = $900,000
- Gross Profit = $315,000
Substituting the values into the formula:
\[ \text{Gross Profit Margin} = \left( \frac{315,000}{900,000} \right) \times 100 \]
Calculating the fraction:
\[ \frac{315,000}{900,000} = 0.35 \]
Now, multiply by 100 to get the percentage:
\[ 0.35 \times 100 = 35% \]
Thus, the gross profit margin is 35%.