Monday

November 24, 2014

November 24, 2014

Posted by **Tonya** on Monday, August 12, 2013 at 8:32pm.

- math -
**Jai**, Monday, August 12, 2013 at 11:43pmTo do this, you have to work backwards. That is, starting from the $15 left. Note that she spent 2/3 of her money and had $15 left. Therefore, this $15 is actually 1/3 of the money she had:

1/3 of something = 15

To do this, just divide 15 by 1/3:

15 / (1/3) = 15*3/1 = $45

And then she spent 1/2. This means that the other half is actually $45:

1/2 of something = 45

Divide:

45 / (1/2) = 45*2 / 1 = $90

And finally, she spent 2/5 of the original money, and had $90 left. Thus this $90 is actually 3/5 of her money:

3/5 of something = 90

Divide:

90 / (3/5) = 90*5/3 = $150 (original amount of money)

Hope this helps~ :)

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