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# Fractions- Need help quickly

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Mr James spent 5/8 of his salary and gave 1/3 of the remainder to his mother. If he had \$300 left, how much did he spend?

Guest Mar 17, 2017
edited by Guest  Mar 17, 2017
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#1
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300/2 = 150

150*5 = 750

Guest Mar 17, 2017
#5
+5888
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Hey Guest, I'm really curious how that worked...can you explain how you knew to do that??

hectictar  Mar 17, 2017
#3
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1500

Guest Mar 17, 2017
#4
+80863
+5

Let his salary = S

After he spends 5/8 of his salary, he has  (3/8 )S  left

After he gives (1/3) of this to his mother he has (3/8)(2/3)S  = (1/4)S left

And this = \$300

So

(1/4)S  = 300     multiply both sides by 4

S = \$1200

And he spent (5/8) of this  = (5/8)(1200) = \$750

CPhill  Mar 17, 2017

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