You are here:

- Home
- Science
- Math for Kids
- Word Problems
- Percentages

Advertisement

Hello:

I read the following in a business mathematics book: "Multiply the number by 1, expressed as 100/100, to change the number to a fraction with the denominator 100."

Why would the author want to indicate multiplying by 1 expressed as 100/100 to change a number into a percentage?

Multiplying by 1 will not change the value of the number. Why is this important to know when changing a number to a percentage?

I know how to change a number to a percentage; so do not explain to me how this process is done!

I thank you for your reply.

This is a little confusing. A percent is the amount out of 100.

In other words, if you have 1 bad and 3 good, that is 1 bad out of 4.

In decimals, that is 0.25. As a percent, it is 25%.

If there are 3 bad parts in 10 parts, that is 3/10 = 0.3. To convert to a percent, always make sure there are at least two digits in the number past the decimal. Since 0.3 only has 1 digit past the decimal, we'll make it be 0.30. To convert to a percent, just shift the decimal by two places. Thus, 0.30 = 30%.

Using this, it can be seen that 0.01 = 1%, 0.13 = 13%, 0.456 = 45.6%, 1.2345 = 123.45%,

1/4 = 0.25 = 25%, 2/5 = 0.4 =0.40 = 40%, etc.

Word Problems

Answers by Expert:

I have answered every question that was a story problems that had any relation to math for which an answer existed. I have ever answered some questions which had a vague relation to math, but still related.

My experience is from when I started doing story problems in grade school.
I have been assisting, helping, and bringing smiles to many others ever since.
Are you the next one?
**Publications**

In over 850 questions answered to other users. Maybe you're the next one ...**Education/Credentials**

I received a BA in Mathematical Sciences from OSU and a MS in Mathematics from OSU as well.
**Awards and Honors**

I earned Both my BS degree and MS degree with honors for having such a high grade point average.
**Past/Present Clients**

I have answered hundreds and hundreds of students at OSU in the 80's and over 8,500 questions right here,
but only a little over 850 of them have been word problems.