Pre-Algebra

How to solve

A fraction is a division problem. For denominators like 2, 4, 5, 8, 10, 20, 25 you can scale to tenths, hundredths, or thousandths instead of long division.

Steps

  1. Try scaling the denominator to 10, 100, or 1000.
  2. Multiply numerator by the same factor.
  3. Read off the decimal.

Example

Write 7/20 as a decimal.

  1. Scale by 5: 35/100.
  2. 35 hundredths is 0.35.

Answer: 0.35

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