Friday

April 18, 2014

April 18, 2014

Posted by **marinda** on Thursday, June 28, 2007 at 9:40pm.

150 is 75% of what number?

I know the rate is 75 percent and the base is 150. I am looking for the amount. My questions is how to find the answer? Do I divide?

Okay maybe I am missing a huge section as to finding the answer to this question. I went back to my reading and looked at some examples. I looked at the answers to these examples and I am now even more confused. The problem I looked up was, 20% of what number is 50? The answer my class book gave me was R% = 20%, B = “what number,” A = 50. Is that really the answer?

Set up the problem as an algebraic expression. I first converted 75% to a decimal (.75). Then I made the expression from what I knew (150 equals 75 percent of an unknown number).

I represented the unknown number with the variable x.

150=.75x

Since the question asks for the unknown number (x) I knew I had to isolate x. To isolate x I first divided both sides of the equation by .75

150/.75=.75x/.75

The result is...

200=x

Because the .75s on the right cancel out, only x is left.

200 is the answer.

Feel free to ask if you have any questions about what I did.

Okay I think I see now. If I have any questions I will ask. Thank you so very much :)

You're welcome! Glad I could help. :-)

**Related Questions**

math - Identify the rate, base, and amount in each rate 75% statement or ...

math - Write each fraction as a percent. 1 1/5=120% 2. Identify the rate, base, ...

Math - identify the rate, base and amount do not work the problem. 150% is 75% ...

math - Identify the rate, base, and amount in each statement or question. Do not...

Math - look at the chart- out of 150 dog owners 75 perfer human food only,45 ...

CHEMISTRY PLEASE HELP - For the reaction A + 2B + C ----> 2 D + E the ...

AP CHEM - For the reaction A + 2B + C ----> 2 D + E the following initial ...

maths - Please guide me to solve the below problem: 'A'an do 2/3 of a work in 40...

math - Identify the rate,base, and amount in the following application at this ...

Math - 150 is 75% what of number? I'm not understanding this please help.