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G.E.D. Math 12d, Solving percentage word problems using mental math

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How to use mental math to solve percent word problems, quickly figure out a tip or commission amount. See the link to tax brackets for the U.S.A. (though this about to change :-/ )
2017-2018 Federal Income Tax Brackets:
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Grade 6 Math #5.5, Solve Proportions using unit rates
Grade 6 Math #5.9, Find the Percent of a Number
Grade 7 Math #5.1a, Find a percent increase between two amounts
Grade 7 Math #5.1b, Find a percent decrease between two numbers
Grade 7 Math #5.1c, Using and finding a percent of change
Grade 7 Math #5.2, Calculate Markup or Markdown
Grade 7 Math #5.3, Using percentages in the Real World
Algebra I #3.10a,
Fractions to Decimals to percents
Algebra I #3.10b,
Solve Equations with percents
Algebra I #3.10c,
Percent increase or Percent decrease
Algebra I #3.10d,
Solve Percent word problems
G.E.D. Math 12a, Elements of a percent problem, finding the PART
G.E.D. Math 12b, Finding the RATE in a percent problem
G.E.D. Math 12c, Finding the percent of increase or decrease
.
2017-2018 Federal Income Tax Brackets:
SUPPORT MY WORK:
YOUTUBE FAN FUNDING on my channel Home page
If you can't afford to become a monthly patron...
click or watch the ads to help me out.
FOLLOW ME:
Grade 6 Math #5.5, Solve Proportions using unit rates
Grade 6 Math #5.9, Find the Percent of a Number
Grade 7 Math #5.1a, Find a percent increase between two amounts
Grade 7 Math #5.1b, Find a percent decrease between two numbers
Grade 7 Math #5.1c, Using and finding a percent of change
Grade 7 Math #5.2, Calculate Markup or Markdown
Grade 7 Math #5.3, Using percentages in the Real World
Algebra I #3.10a,
Fractions to Decimals to percents
Algebra I #3.10b,
Solve Equations with percents
Algebra I #3.10c,
Percent increase or Percent decrease
Algebra I #3.10d,
Solve Percent word problems
G.E.D. Math 12a, Elements of a percent problem, finding the PART
G.E.D. Math 12b, Finding the RATE in a percent problem
G.E.D. Math 12c, Finding the percent of increase or decrease
.
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