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FutureStarrWhat Is the Fraction Button on a Calculator
It’s a basic math tool. But there’s a story behind its design. In the 15th century, Leibniz invented the slide rule. It was one of the earliest computing devices. The design for a slide rule included a fractional button on one side. You’d use it to multiply the numbers on the other side. The fractional button had to be closer to the other numbers because it’s harder to multiply fractions than just whole numbers.
You can't convert a decimal to a fraction on the calculator, but the calculator can help you do it with a pencil and paper. Suppose you want to express 0.7143 as a fraction. You could write it as 7143/10,000, but maybe you want to reduce this to something a lot more simple, such as a denominator that's a single digit. To do this, enter the original number as decimal, and then multiply by the desired denominator. This gives you the numerator of the fraction. For example, if you want a fraction with 7 in the denominator, multiply 0.7143 by 7. The calculator will display the numerator, which in this case is 5.0001, which is close enough to 5 to be equal. You can then write the fraction 5/7 on a piece of paper.
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Calculating numbers that contain fractions can be tricky, even when you’re using a calculator. You may be able to write a fraction on a calculator using the fraction button. If your calculator doesn’t have this feature, use an online calculator if you’re allowed to do so. As another option, you might turn the fraction into a decimal or turn the fraction into a percent.
Divide the numerator by the denominator to get a decimal. The numerator is the top number in the fraction. Type the numerator into your calculator, then push the divide button. Next, type the bottom number into the calculator, which is the denominator. Hit the equal sign to get your decimal. (Source: www.wikihow.com)