Question

Bob makes mixture of 4/7 of plant food for every gallon of water.if he uses 10 1/2 gallons of water,what is the total amount of plant food needed

Answer 1

This is a ratio problem

4/7/1 gal = x/10.5 gal

4/7 x 10.5 = 6

1x = 6

so x is 6