Question

jacob used 1/7 of liter of water to fill 1/9 of the fish aquarium. how many liters of water are needed to fill the aquarium

Answer 1

To find the result we can use proportion


`(1)/(7) --------------- (1)/(9) \\ x ---------------1`

Now we have crossmultiply, so

`(1)/(7)*1= (1)/(9) *x` /*9 (multiply both sides by 9)

`(9)/(7)=x` - its the result