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"Window Box” method of doing percents |
Follow These Steps
| Part (is) |
% |
| Whole (of) |
100 |
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1) Set up the facts in the window box
2)
Multiply the two numbers that are diagonal / or \
3)Divide by the remaining number
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| Examples: |
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A) Solving for the whole |
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Step 1) |
| What is the whole number if 83% of number is 332 |
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Step 2) 332 X 100 = 33200 |
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Step 3) 33200 divided by 83 =
400
the whole is 400 and this is your answer
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B) Solving for the Part |
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| There are 240 students at computer school. About 30% of
these students are involved in computer programming. About how many
students are involved in computer programming |
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Step 1) |
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Step 2) 30 x 240 = 7200 |
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Step 3) 7200 divided by 100 =
72 the part is
72 |
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| C) Solving for the % |
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There were 15 out of 90
winter days that were snowy. About what percent of the winter days were snowy? |
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Step 1) |
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Step 2) 15 x 100 = 1500 |
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Step 3) 1500 divided by 90 =
16.6% or about 17%
of the days were snowy |