Question

what number must be subtracted from each term of the radio 15:23, so that the radio becomes 7:15?

Answer 1

$\underline\bold\pink{\huge{HELLO\:DEAR}}$

$\underline\bold\red{\huge{ANSWER : }}$

Let the number to be subtracted be x.

Then,

$\frac{15 - x}{23 - x} = \frac{7}{15}$

$=> 15(15 - x) = 7(23 - x)$

$=> 225 - 15x = 161 - 7x$

$=> - 15x + 7x = 161 - 225$

$=> 8x = 64$

$=> x = 8 \: \: (answer).$

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