Printable Fraction of a Number Worksheets

Fraction of a number worksheets teach 3rd through 5th graders to calculate fractional sets like finding 2/3 of 18. These printable pages feature array grouping, word problems, and complete answer keys.

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Structured, printable skill sheets with step-by-step guidance for Fraction of a Number.

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About Fraction of a Number

What this skill is

Finding a fraction of a whole number applies fraction concepts to sets, solved by dividing the whole by the denominator and multiplying by the numerator.

When children learn it

Unit fractions of sets begin in 3rd grade, expanding to non-unit fractions and multiplication connections in 4th and 5th grade (CCSS 4.NF.B.4, 5.NF.B.4).

Teaching Tips

  • Teach the two-step chant: "Divide by the bottom, multiply by the top!". For 3/4 of 20: 20 divided by 4 is 5; 5 times 3 is 15. Chanting this rhyme makes multi-step set fractions simple.

Common Mistakes

  • Multiplying by the denominator and dividing by the numerator by mistake.
  • Finding only the unit fraction (1/3 of 18 = 6) and forgetting to multiply by the numerator for non-unit fractions (2/3 = 12).
  • Struggling when the whole number does not divide evenly by the denominator.