The denominator of the fraction 4/15 is increased by an amount so that the value of the resulting fraction is 1/5. Determine the amount by which the denominator was increased.

Question

anonymous · Answer

Do you have an idea of how to write the equation?

anonymous · Answer

A little number sense will find it too. 4/x = 1/5?

anonymous · Answer

then what do i do?

anonymous · Answer

Think about it.

anonymous · Answer

It's like reducing fractions to lowest terms, but in reverse because you are finding higher terms.

anonymous · Answer

The actual equation to find what the question is asking is$$\frac{4}{15+x}=\frac{1}{5}$$
You can cross-multiply and all that to solve the proportion, but a little number sense will find the answer much faster.

anonymous · Answer

i got 5