In which of the salts – calcium carbonate or calcium hydrogencarbonate – is the mass fraction of carbon higher?

M (CaCO3) = Mr (CaCO3) = Ar (Ca) * N (Ca) + Ar (C) * N (C) + Ar (O) * N (O) = 40 * 1 + 12 * 1 + 16 * 3 = 100 g / mol;
ω (C in CaCO3) = N (C in CaCO3) * Ar (C) * 100% / Mr (CaCO3) = 1 * 12 * 100% / 100 = 12%;
M (Ca (HCO3) 2) = Mr (Ca (HCO3) 2) = Ar (Ca) * N (Ca) + Ar (H) * N (H) + Ar (C) * N (C) + Ar ( O) * N (O) = 40 * 1 + 1 * 2 + 12 * 2 + 16 * 6 = 162 g / mol;
ω (C in Ca (HCO3) 2) = N (C in Ca (HCO3) 2) * Ar (C) * 100% / Mr (Ca (HCO3) 2) = 2 * 12 * 100% / 162 = 14, 81%.