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Master Percent of a Number: Quick Mental Math Techniques

11WE.A1.1

Simple interest

Simple Interest — Word Problem

Basic Concepts of Simple Interest – Word Problem

Borrowing Money for More Than One Year  – Word Problem

Investigate the Advantages of Borrowing Money  – Word Problem

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11WE.A1.2

Taxes, discounts, tips and more

Discounts — Word Problem

Taxes — Word Problem

Percentage - Applying a Discount Price– Word Problem

Percentage - Applying a Discount Percent – Word Problem

Percentage - Applying a Tax Total – Word Problem

Percentage - Applying a tax Percent – Word Problem

11WE.A1.4

Arithmetic sequences

Arithmetic series

Arithmetic series formula

11WE.A2.2

Rectangular shape related questions in linear equations

Percent of a number

Percent of a Number

percent of a number – Word Problem

Percent of a Number  Fraction Percent

Percent of a Number Integer Percent 

Percent of a number number With Decimal Percent 

Percent of a Number  Three Digits Number Percent

11WE.A3.4

Adding and multiplying percents

Add and Multiply Percents — Word Problem

Add and Multiply Percents – Word Problem

11WE.A3.6

Money related questions in linear equations

11WE.A3.8

Rates

Find the Biggest Rate 

Find the Unit Price 

Unit Rate Fill in Box

Find the Quickest Rate 

Unit Rate

11WE.B2.1

Geometric sequences

Geometric series

Geometric Series

11WE.B2.2

Finance: Compound interest

Finance: Compound Interest

11WE.C1.7

Applications of quadratic functions

11WE.C2.1

Scale diagrams

11WE.C2.4

Distance and time related questions in linear equations

Grade 11 Mathematics for Work and Everyday Life, Workplace Preparation (MEL3E)

A. Earning and Purchasing

B. Saving, Investing, and Borrowing

C. Transportation and Travel

math

Intro

Rain precipitation word problem using 12.5% increase

Finding 15% of 40 using a mental math shortcut

Calculating 320% of 600 without a calculator

Finding 17.5% of 20 by splitting into simpler percents

Finding 20 and a quarter percent of 50 without a calculator

Intro to finding the percent of a number using proportions

In this section, we will try to estimate the percent of a number without using a calculator. The trick is to breakdown the percent into smaller percent first. These smaller percentages are easier for mental calculation.

Finding the percent of a number made easy

Representing percents

Applications of percents

Percents, fractions, and decimals