Question

write the proper number in the box 9 / 11 = 18 / how​

Answer 1

Step-by-step explanation:

9 / 11 =( 2×9)/(2×11)=18/22

Answer 2

SOLUTION

CORRECT QUESTION

TO DETERMINE

The proper number in the box

$\displaystyle \sf{ \frac{9}{11} = \frac{18}{ \boxed{ \: \: }} }$

EVALUATION

Let x be the required number in the box

Then we have

$\displaystyle \sf{ \frac{9}{11} = \frac{18}{ x} }$

$\displaystyle \sf{ \implies \: 9x = 18 \times 11 }$

$\displaystyle \sf{ \implies \: x = \frac{18 \times 11}{9} }$

$\displaystyle \sf{ \implies \: x =22 }$

FINAL ANSWER

$\displaystyle \sf{ \frac{9}{11} = \frac{18}{ \boxed{ \bf{ 22 } \: }} }$

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