Metric Units Joan and Fiona are cousins whose grandmothers w

Metric Units

Joan and Fiona are cousins whose grandmothers were sisters. Joan’s grandmother moved to the U.S. and Fiona’s grandmother stayed in Scotland. Scottish shortbread is one of Scotland’s most famous desserts. Both Joan and Fiona make traditional Scottish shortbread. Joan and Fiona have copies of their grandmothers’ recipes and wanted to see if they both use the same family recipe.

Joan’s Recipe (English System)

Fiona’s Recipe (Metric System)

1 cup butter

120 gram butter

½ cup sugar

55 gram sugar

2 ½ cups flour

280 gram flour

Think about it:

They exchanged recipes and couldn’t decide if the recipes are the same. They tried to find the conversions on Google but they had trouble. Why is it difficult to compare these recipes?

Solution

The two recipes are different.Because 1cup butter is equal to 227grams butter, 1/2 cup sugar is equal to 100grams sugar and 2 1/2 cups flour is equal to 300 to 335 grams (depends on type of flour).

This is difficult to compare these tow recipes because Joan has chosen volume of quantity and Fiona has chosen weight of quantity to prepare their recipes.