Laughner - Percent and Decimals 1.1.7
HS Math
Created on September 11, 2024
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Transcript
Start
Percent & Decimals
Both represent part of a whole
Think about our coins.Each coin represents part of $1.00
How are Fractions & Decimals alike?
40 ¢
You have 2/5 (two-fifths) of a dollar. How would you find the eqivalent fraction?
Fraction to decimal comparison
Part of a Whole
0.# - tenths place 0.0# - hundreths place
Fraction
Decimal
Out of 100
Percent
Percent, Decimal, & Fraction Forms
Click here to check your work here.
How can you represent the following percents?
Percent, Decimal, & Fraction Forms
Place percent over 100 to write the fraction-Reduce if needed
Divide by 100
Multiply by 100
Divide numerator by denominator
Percent to Fraction
Percent to Decimal
Decimal to Percent
Fraction to Decimal
Denominators that are not factors of 100
PEMDAS
Sometimes you will need to convert fractions and percentages to decimals to make it easier to solve the problem.
Expressions & equations
-0.33x + 700% = 30
Practice question
- Stores offering percent discount on products
- Salesperson being paid a percentage of sales
- Percent increase in living expenses
Here are some examples.
How does this work in the Real World?
Remember to convert the percent to a decimal.
What is 34% of 60?
What percentage of ___ is ___?
What percent of 50 is 4?
Remember to convert the percent to a decimal.
81% of what amount is 100?
What percentage of ___ is ___?
Identify the percent, the whole, and the part.
Hint:
What number is 60% of 130?
(percent as a decimal)(whole) = part
Solve the Equation, Part 2
Solve the Resulting Two-Step Equation, Part 1
Eliminate the Fraction Using a Common Denominator
solving two-step equations with fractions
two-step equations
There are 29 sandwiches at a party. The sandwiches are divided into thirds so that each person will get one-third (1 / 3) of a sandwich.
Real World Practice Question
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