Posted by **Sarah** on Tuesday, October 16, 2012 at 9:49pm.

21 is (66 and 2/3)% of what number?

I believe the answer is 14.

is it right?

- Math -
**Ms. Sue**, Tuesday, October 16, 2012 at 9:50pm
No. 14 is 66 2/3 of 21

0.666667x = 21

Your answer will be more than 21.

- Math -
**Sarah**, Tuesday, October 16, 2012 at 9:55pm
this is confusing :(

this is how I am solving.

66 2/3 12

------- = -----

100 W

so i mulitiplyed 100x12= 2100.

and from here I don't know how to insert 66 2/3 into calculator.

2100 divided by 66.667?

the choice to answers are

14, 3.17, 315 and 31.5

I know for sure that 14 is not the answer. i get different answers everything i play with that 2/3. please help

- Math -
**Reiny**, Tuesday, October 16, 2012 at 10:03pm
66 2/3% = 200/300 = 2/3

so just like Ms Sue stated ...

(2/3)x = 21

times 3

2x = 63

divide by 2

x = 31.5

Where did you get the 12 from in your solution?

(dyslexia) ??

had your ratio been:

(66 2/3) / 100 = 21/w

it would have worked:

(200/3) / 100 = 21/w

(200/3)w = 100(21)

(200/3)w = 2100

times 3

200w = 6300

w = 6300/200 = 31.5

- Math -
**Ms. Sue**, Tuesday, October 16, 2012 at 10:03pm
0.666667x = 21

x = 21/0.666667

x = 31.5

- Math -
**Sarah**, Tuesday, October 16, 2012 at 10:07pm
oh, okay.

now I get it. thanks!!!

- Math -
**Ms. Sue**, Tuesday, October 16, 2012 at 10:10pm
You're welcome.

I'm glad you've got it. :-)

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