Bar Graphs Math Example 3

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Example 3

medium
A bar graph shows favorite subjects: Math =25= 25, Science =18= 18, English =30= 30, History =22= 22. What percentage of total votes did Science receive?

Solution

  1. 1
    Find the total number of votes: 25+18+30+22=9525 + 18 + 30 + 22 = 95.
  2. 2
    Compute Science's share as a fraction: 1895\frac{18}{95}.
  3. 3
    Convert to a percentage: 1895×100≈18.95%\frac{18}{95} \times 100 \approx 18.95\%.

Answer

≈18.95%\approx 18.95\%
To find what percentage one category represents, divide its value by the total of all categories and multiply by 100. Bar graphs make it easy to read individual values, but calculating percentages requires summing all bars first.

About Bar Graphs

A chart that uses rectangular bars of different heights or lengths to represent and compare quantities, where each bar's length is proportional to the value it represents and categories are shown on one axis.

Learn more about Bar Graphs →

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Example 5 medium

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