Question

What number needs to be added to 7 and 9 so that the ratio of the first number to the second becomes 4 : 5?

Answer 1

The number is 1.

• Let the number be x.

• Now after adding 7 and 9 and taking the ratios of first and second the ratio becomes 4:5.
• According to the given condition,

$\frac{x+7}{x+9} = \frac{4}{5}$

Cross multiplying both sides , we get

5x + 35 = 4x + 36

x = 1

• The number obtained is 1.
• The number that is added to 7 and 9 and when taken ratio gives 4:5.

Answer 2

Answer:

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Step-by-step explanation:

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