The calculation you provided can be solved using the formula for calculating percentage:
(100g / (100g + 0.015g + 438g + 200g + 74.5g)) × 100%
Let's calculate it step by step:
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 12.29%.