Table of contents

0. Review of Algebra4h 18m
1. Equations & Inequalities3h 18m
2. Graphs of Equations43m
3. Functions2h 17m
4. Polynomial Functions1h 44m
5. Rational Functions1h 23m
6. Exponential & Logarithmic Functions2h 28m
7. Systems of Equations & Matrices4h 6m
8. Conic Sections2h 23m
9. Sequences, Series, & Induction1h 22m
10. Combinatorics & Probability1h 45m

0. Review of Algebra

Exponents

College Algebra

0. Review of Algebra

Exponents

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0:55 minutes

Problem 152

Textbook Question

Write each percent as a decimal. 39%

Verified step by step guidance

Start by understanding that a percent is a part per hundred. The symbol '%' means 'per 100'.

To convert a percent to a decimal, divide the percentage value by 100.

For 39%, you would perform the division: 39 / 100.

This division can also be thought of as moving the decimal point two places to the left.

So, 39% as a decimal is represented by moving the decimal point two places to the left of 39.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Percentages

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare proportions and is denoted by the symbol '%'. For example, 39% means 39 out of 100, which can be useful in various applications such as finance, statistics, and everyday calculations.

Decimal Representation

A decimal is a way of representing fractions in a base-10 system, using a decimal point to separate the whole number part from the fractional part. Converting a percentage to a decimal involves dividing the percentage by 100. For instance, 39% as a decimal is 0.39, which simplifies calculations in algebra and other mathematical contexts.

Conversion Process

The conversion process from percentage to decimal is straightforward: simply divide the percentage value by 100. This process is essential in algebra for solving equations and understanding ratios, as it allows for easier manipulation of numbers. For example, converting 39% to a decimal involves calculating 39 ÷ 100, resulting in 0.39.