I apologize for the confusion. Let me correct my previous response.
To calculate the value of the expression (100g / (100g + 0.015g + 438g + 200g + 74.5g)) * 100%:
Add up all the values inside the parentheses: 100g + 0.015g + 438g + 200g + 74.5g = 812.515g
Divide 100g by the sum obtained in the previous step: 100g / 812.515g ≈ 0.1229
Multiply the result by 100 to get the percentage: 0.1229 * 100% ≈ 12.29%
Therefore, the result is approximately 12.29%.