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into decimal form. To convert the fraction into a percentage, it is easiest to have a decimal number. For our example, 1/10 = 0.1. Calculators will be able to convert more difficult numbers quickly for you.  If you cannot use a calculator, it may take using long division to convert the fraction to a decimal. Usually, about 4 or 5 digits past the decimal place will be sufficient to round to. You should always be dividing a positive number by a positive number when converting to decimal form. the result times 100. Simply multiply the result, 0.1 in this example, by 100. This will convert the answer into percentage form. Just add the percentage symbol to the answer, and you're done. In this example, 0.1 x 100 = 10. Add the percent sign to get 10%, your percentage error. Often swapping signs (positive/negative) and dividing can lead to minor errors in your calculations. It is best to go back to check your answer makes sense.  In our example, we want to make sure that our approximation of 9 oranges is off by 10% of the actual value of oranges. 10% (10% = 0.1) of 10 oranges is 1 (0.1 x 10 = 1). 9 oranges + 1 = 10 oranges. This confirms that the guess of 9 was indeed off by just 1 oranges or 10% of the actual value of 10 oranges.
Convert the fraction Multiply Check your work to make sure the answer is correct.