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Calculation Tips

Tips on calculation

QuestionAnswer
PEMDAS - Order of Operation Please Excuse My Dear Aunt Sally: Parenthesis/Exponents/Multiplication/Division/Addition/Subtraction
Fractions can be converted into a whole number(with or without decimals)by dividing the numerator (top) by the denominator (bottom)
To multiply Fractions first multiply all numerators, then multiply all denominators. The final step is to reduce the final fraction down the lowest number which is done by dividing the numerator by the denominator. Top line all the way across & bottom of the line all across
Percentages refer to parts per 100. 3% is equal to 3 parts out of 100. i.e 3% = 3%= 3 parts of 100 = 3/100 = 0.03
Ratios are proportions or fractions just written in a different format. i.e. 1:2= 1:2= 1 per 2 parts = 1/2;turn into a fraction by dividing 1 by 2 = 0.5 and then into a percentage by moving the decimal point in two places to the right - 50%
Created by: izeno
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