# Find the missing number in the box [ ] in the proportion:  [ ]/18 = 2/9

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Find the missing number in the box [ ] in the proportion:

[ ]/18 = 2/9

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Let us assume the missing number be y.

Then, y/18 = 2/9

By cross multiplication we get,

Y = (2 × 18)/9

Y = 36/9

Divide both numerator and denominator by 9.

Y = 4

Therefore, [4]/18 = 2/9