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To work out this problem....
9 / 5 = 135 / ??

... take 135 and divide by 9... and you see that 135 is 15 times more than 9.... (9 x 15 = 135)....

Therefore, if the 135 is 15x greater, than the ?? must also be 15 times greater than the 5 for them to both be equal. Therefore,

15 x 5 = 75

9/5 = 135 / 75

You can "Visualize" your answer like this....
If I have 9/5 and I double it, that would be 18/10 (Still the same)
27/15, 36/20, etc. etc.... increasing each of the numbers until you get to 135/75.

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15y ago

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