# One-half cup of black beans provides 15% of the potassium you need daily. You must get the remaining 2890 milligrams from other sources. How many milligrams of potassium should you consume daily?

Dec 7, 2016

Total potassium intake required is 3400 milligrams

#### Explanation:

Let the total amount required be $t$

You have 15% already. This means that the amount yet to be taken is:

(100-15)% = 85%

so " "85%t=2890

write as:

$\textcolor{b r o w n}{\frac{85}{100} t = 2890}$

Multiply both sides by $\textcolor{b l u e}{\frac{100}{85}}$

$\textcolor{b r o w n}{\textcolor{b l u e}{\frac{100}{85} \times} \frac{85}{100} \times t = \textcolor{b l u e}{\frac{100}{85} \times} 2890}$

$1 \times t = 3400$