Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
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Exercise 1 Page 273

To write a percent as a decimal, move the decimal point two places to the left and remove the percent symbol. Construct a 10 * 10 grid to represent this decimal.

Decimal: 0.74
Example Model Representation:

Model
Practice makes perfect

Decimals and percents are ways to show parts of a whole.

Writing the Percent as a Decimal

To write a percent as a decimal, we ignore the percent symbol and move the decimal point two places to the left. Let's do it!
Percent to decimal

We found that 74 % expressed as a decimal is 0.74.

Representing the Decimal Using a Model

Now we want to represent 0.74 with a model. Begin by constructing a 10 * 10 grid — a total of 100 smaller squares. In this grid one square will correspond to 1 % or 0.01. Then the whole square represents 100 %.

Grid
Since 0.74 is 74 parts out of 100 parts, we will color 74 small squares.
Model