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Predicting counts from a fraction worksheets

If something happens 3 times in 10, how often is it in 200 tries? These free printable worksheets turn a fractional probability into a predicted count, with every answer a whole number.

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Predicting counts from a fraction
Predicting counts from a fraction worksheet — Whole-number counts, free printable with answer key

The answer key prints on a separate page.

What's on this sheet

A probability is a rate, and a count is that rate applied. P(red) = 3/10 means 3 of every 10, so over 200 spins you split the tries into 20 tens and take 3 from each: 60. Saying it as “groups of ten, three from each” keeps it a multiplication a child understands rather than a formula, and it is why the trial counts are built to divide the denominator cleanly.

Why this sheet works

This is the half of probability a pad can mark. Finding P(red) itself gives a fraction, which the online keypad cannot take; multiplying it out gives a whole count of things, so this is the probability topic a child can practice on screen as well as on paper. No sheet asks for 62.5 of anything — the numbers are chosen so the answer lands whole.

How this one works

P(blue) = . In 150 draws, how many are blue?

150÷25=6
18×6=108
  1. means 18 out of every 25. So split the 150 into groups of 25: 150 ÷ 25 = 6.
  2. Each group of 25 gives 18 of them, and there are 6 groups: 18 × 6 = 108.

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