You are baking cookies. you have 7 1/4 cups of flour. you use 2 3/4 cups of flour. how much flour do you have left?

I like changing things into decimals, so 7.25-2.75. For the moment, pretend the decimal isn’t there and the equation is 725-275. That equals 450. Now we put the decimal back, so since it is subtraction you keep the decimal in the same place (two spots away from the end). So the answer is 4.5.

I used an online math calculator to find this answer
7 1/4 - 2 3/4 = 92 = 412 = 4.5