APPLICATION OF FRACTIONS IN OUR REAL LIFE

Finding Fractions Around You

We don't want you thinking that you will only use fractions in math classes. Fractions are around you every day of the week. Do you know about that container of milk in your refrigerator? It is probably a half gallon. Drinks you buy in the store might come in half-liter bottles. When you want to buy some food at the deli, you might ask for a quarter or half a pound. Your parents probably think about how much gas they have every day. It's great to have a full tank, but they also know if they have three quarters, a half, or a quarter of a tank left. 

Those examples are easy to imagine, but what about adding fractions and multiplying fractions? In the fraction word problems section, we told you about pieces of pie at a party. If a pie has six pieces, you need to know if you have enough food for everyone. What about drinks? If you have a half gallon of water, will it be enough for everyone to get two glasses each? It's all about fractions. 

Construction

We admit that the decimal system is easier for measurements, but the United States still uses inches and feet to make measurements. If you want to build a table, you might need to have it six feet two and a quarter inches long (6' 2 1/4"). Let's say you cut the board too long and your boss says, "Cut off a sixteenth of an inch." You need to know how long that is or everything gets messed up. 

You could also have a day when you need to buy a piece of plywood. You might need five pieces that are thirteen and five eighths of an inch long. How much plywood would you need? You'll be multiplying fractions to get those numbers. (5 x 13 5/8 = ?) 

Cooking

We talked about measuring in construction. Cooking is the same. You need to measure things whenever you follow a recipe. You have half-cups, quarters of a teaspoon, and a whole bunch of other measurements. Your cookbook might only have recipes that serve two people. What if you have some friends over? What if you're a professional chef and you are making food for a party? You will need to do a bunch of multiplication so that your food comes out right. You'll also need to work with fractions to find out if you have enough food in the pantry or if you need to buy more. 

Fractions and Ratios in Science

This won't be a surprise, but fractions and ratios are used in science. Luckily, most of science has moved to the decimal system when it comes to measuring amounts. You will still need fractions if you are counting things. Let's say you are working with colonies of bacteria. You will need to count the numbers of different bacteria in a dish. You could get 6 of one species, 3 of another species, and 4 of a third species. Where are the fractions? You actually have 6/13, 3/13, and 4/13 in that dish. Those values can tell you a lot about how bacteria reproduce and survive.