I need to figure what % of our total monthly income I contribute.

Question

If I make ${$}1100$ month and my husband makes ${$}2720$ month (total combined ${$}3820$ month), what percent do I make of our total monthly income and what percent does my husband make of our total monthly income?

Answer 1

Percentage of total income will be the ratio of your income to the total income, multiplied by $100$ (for scaling purposes).

Your income: $$\frac{1100}{3820} \approx 0.2880= 28.80\%$$

Therefore, your husband's contribution is (approximately): $100\% -28.80\% = 71.20\%$

Answer 2

We may use the "standard" proportion formula for this $${x\over100} = {\text{part}\over\text{whole}}.$$ Considering your income only, then the "part" is $\$1100$, and the whole is $\$3820$. So, $${x\over100} = {1100\over3820} \implies x = 100\times{1100\over3820} \approx 28.80\%. $$ So you make about $28.80\%$ of the income. Then your husband's contribution is simply $100\% - 28.80\% = 71.2\%$.

Answer 3

You: $$\frac{1100}{1100+2720}\cdot100\approx28.8\%$$

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Him: $$\frac{2720}{1100+2720}\cdot100\approx71.2\%$$

Answer 4

$\text{Percentage} = \frac{\text{Person Contribution}}{\text{Total}} \times 100$

Your -

$= \frac{1100}{1100 + 2720} \times 100$

Your husband -

$= \frac{2720}{1100 + 2720} \times 100$