Answer
About 27.27% of Carbon.
Work Step by Step
The represented molecule is $C_{}O_{2}$.
1. Find the mass of $C_{}O_{2}$:
C: 12 x 1 = 12
O: 16 x 2 = 32
12 + 32 = 44
2. Divide the mass of Carbon in the molecule by the total mass:
$\frac{12}{44}$ $\approx$ 0.2727
3. Multiply the result by 100%:
0.2727 x 100% = 27.27%