Converting ratios is a simple calculation that you can complete with a calculator. Solve easy ratios by reducing the numbers through a common factor to one that is simple enough to not require a calculator.
Know MoreSimplifying a ratio may involve working with multiple ratios. If you are adding the ratios, ensure that the denominators are the same. For example, if you are given 2/3 and 1/2, the least common denominator is six. Divide this number by the denominator in the fraction, and multiply that result by the numerator. If you are asked to multiply two ratios, use cross-multiplication. To do this, multiply the numerator of one ratio by the denominator of the other. Do this for both numbers.
Simplify a single ratio by ensuring that it is in the lowest common form. For example, 4/16 can be reduced because 16 is a multiple of 4. Dividing both terms by 4 produces a new ratio of 1/4. This reduction typically involves a whole number without decimal spaces. Therefore, you cannot reduce a ratio like 2/7 any further.
Calculate the result to finish the conversion. For simple ratios, such as 1/4, you may know the answer offhand and won't need a calculator. For more difficult ratios, you may need a calculator to ensure accuracy.
Students can write out a fractional part, such as 44/100 as forty-four hundredths, which is the word form for this fraction. Another way to express this fraction is in decimal form or 0.44. To convert fractions that have 100 in the denominator, a student can multiple the numerator by 0.01.
Full Answer >The multiplication of percentages is accomplished by converting the percentage to decimals, and multiplying the decimals. To convert a percentage to a decimal, the percent sign must be removed, and the number divided by 100. The decimal point should always be moved two places to the left when dividing by 100. After dividing 75 by 100, the answer is 0.75.
Full Answer >A decimal number can be transformed into a percentage by multiplying it by 100. If the number is a fraction, it is first necessary to convert it into a decimal by dividing the numerator by the denominator.
Full Answer >Some simple way kids can figure out percentages are to relate basic fraction with percentages or use grid paper. Grid paper that is 10 by10 is useful for teaching younger students that a percentage is given as parts per 100. For example, using grid paper or sheet, teachers can show that 10 percent is 10 squares on the grid sheet that contain 100 squares, or 10 per 100; once students master finding percentages with this technique, they can move on to equating basic percentages like 10 percent, 25 percent and 50 percent with their corresponding fractions.
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