Thing 1 A. You can set up a proportion by dividing how much of something there is by the original. (This probably doesn't make much sense but I hope you can understand it from the answer to the problem below!) B.First, do 168/21 to see how many more times he put flour in. 168/21= 8 Then to find out the milk in the same proportion do the number (in this case 8) times the original of the thing you wan to find out. 8x9=72 72 tablespoons of milk are needed for 168 cups of flour in this adapted recipe.
Thing 2 24/36=8y To solve any equation, you want to have letters on one side and numbers on the other, so... -8 from both sides... (24/36)-8=y 24/36=0.6 y=(0.6-8) y=-7.4