Scaling Up Fractions and Mixed Numbers in Your World -...

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Scaling Up Fractions and Mixed Numbers in Your World Cookie Recipe 1Cups of butter = 21¼ Cups of butter 1 1/16 = 1*16+1/ 16 = 17/16 17/16 * 20 = 17/16 * 20/1 = 340/16 = 85/4, 85/4 * 20 = 211/45/8 Cups of white sugar = 121/2Cups of white sugar5/8 * 20 = 5*20/ 8*1 = 100/8 = 25/2, 25/2 =121/21¾ Teaspoons of vanilla extract = 35/1 Teaspoons of vanilla extract13/4 = 1*4+3/4 = 7/ 4. 7/4 * 20 = 7*20/4*1 = 140/4 = 35, 13/4* 20 = 35/117/8Cups of all-purpose flour = 371/2Cups of all-purpose flour17/8 = 1*8+7/ 8 = 15/8, 15/8 * 20 = 15*20/8*1 = 300/8 = 75/2, 75/2 = 371/25/6 Cups of chopped almonds = 162/3Cups of chopped almonds 5/6 * 20 = 5*20/6*1 = 100/6 = 50/3, 50/3 = 162/37/12 Cups of confectioner sugar = 112/3Cups of confectioner sugar7/12 * 20 = 7*20/12*1 = 140/12 = 35/3, 35/3 = 112/3I scaled up the recipe by determining how many cookies the original recipe makes and how many cookies I needed. Since I needed enough cookies for 360 people to get two cookies each I needed 720 cookies. Since the original recipe makes 36 cookies I had to multiply that by 36 until I got to 720, another way to do that is by dividing 36 by 720. 720 divided by 36 is 20 so I multiply each ingredient by 20 to have enough dough to feed 360 people 2 cookies each. Example: step 1: conversion, (this

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