Representing percents

Representing percents

In this section, we calculate the percents of numbers using loading-strip models. Along with these models, we calculate the percents of numbers using our knowledge from previous sections on adding and subtracting decimal numbers and dividing decimal numbers. For example, to determine 75% of a number, we add the decimal values of 50% and 25% of the number. Also, to determine 50% of a decimal number, we divide that decimal number by 2.
Basic Concepts: Multiplying decimals, Order of operations (PEMDAS), Using models to add and subtract fractions
Related Concepts: Percents, fractions, and decimals, Adding and multiplying percents

Lessons

  • 1.
    Use the loading-strip model to calculate.
    a)
    Calculate 25% of 48.
    Representing percents by loading-strip model

    b)
    Calculate 12.5% of 250.
    calculating percents using loading-strip model

  • 2.
    Calculate using loading-strip models.
    a)
    50% of 16 marbles

    b)
    75% of 30 pink flamingos

    c)
    10% of 100 Oompa Loompas

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11.
Fractions, Decimals, and Percents
11.1
Representing percents
11.2
Modeling percents
11.3
Percent of a number
11.4
Converting among decimals, fractions, and percents
11.5
Percents, fractions, and decimals
11.6
Applications of percents
11.7
Adding and multiplying percents
11.8
Taxes, discounts, tips and more
11.9
Simple interest
Grade 7 Math