Homework Help: the percent equation

Posted by Fabian on Tuesday, January 27, 2009 at 10:29pm.

1. find 30% 0f 70
2 what is 80% of 65
3 what percent of 56 is 14
4 36 is what percent of 40
5 80 is 40% of what number?
6 65% of what number is 78
7 what percent of 2000 is 6
8 12 is what percent of 4000
9 what percent of 3000 is 18
10 what is 110% of 80
11 find 180% of 160
12 4% if what number is 11

help please with any of these! :)

the percent equation - Ms. Sue, Tuesday, January 27, 2009 at 10:32pm
1.
0.23 * 70 = ?

3.
14 / 56 = ?

5.
0.4x = 80
the percent equation - DrBob222, Tuesday, January 27, 2009 at 10:36pm
1.
Fine 30% of 70. The word of means multiply.
0.30 x 70 = 21

3. What percent of 56 is 14.
We don't know percent so we call it y. Remembering that of means multiply, we have y*56=14
solve for y. I get y = 14/56 = 0.25 as a decimal. You convert decimals to percents by multiplying by 100 (which is the same as moving the decimal to the right 2 places so 0.25 = 25%)

I think these two methods will solve most of the problems.
Check my work. I'm bad about typos.
the percent equation - Anonymous, Thursday, February 5, 2009 at 6:47pm
54 of 14
the percent equation - jiiug, Sunday, August 22, 2010 at 1:35pm
25%

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