Question

Two-fifth of one -third of three-seventh of number is 15. What is 40 percent of that number

Answer 1

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Answer 2

Answer:

 40 percent of the 1575 is 105 .

Step-by-step explanation:

As given

Two-fifth of one -third of three-seventh of number is 15.

Let us assume that the unknown number be x .

$\frac{2}{5}\times \frac{1}{3}\times \frac{3}{7}\times x = 15$

Simplify the above

$x = \frac{15\times 5\times 3\times 7}{2\times 1\times 3}$

$x = \frac{1575}{6}$

x = 262.5

Percentage formula

$Percentage = \frac{Part\ value\times 100}{Total\ value}$

Percentage = 40%

Total value = 262.5

Put all the values in the formula

$40= \frac{Part\ value\times 100}{262.5}$

$Part\ value = \frac{262.5\times 40}{100}$

$Part\ value = \frac{10500}{100}$

Part value = 105.

Therefore the  40 percent of the 1575 is 105 .