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Sunday, August 20 2017 @ 09:54 PM CDT
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By: achieve_goal (offline)  Tuesday, October 18 2011 @ 12:17 AM CDT (Read 1210 times)  
achieve_goal

Marty used 5/8 of her savings to buy a watch and 1/4 of her savings to buy a bag. She paid $80 for the watch. How much did she pay for the bag?

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By: keeferae (offline)  Tuesday, October 18 2011 @ 03:23 AM CDT  
keeferae

Total = 5/8 + 3/8

Used 5/8 to buy a watch -------> convert to 20/32 (multipy by 4/4)
Remainder = 3/8

Of the 3/8, 1/4 is used to buy a bag -------> 3/8 x 1/4 = 3/32

Therefore savings = 3/8 x 3/4 = 9/32

From the above, 20u is used to buy the watch, 3u is used to buy the bag and savings is 9u.

If Marty paid $80 for the watch ---------> 20u = $80
1u = $80/20 = $4

Therefore, Marty used 3u x $4 = $12 to buy a bag.


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By: myluckystar111 (offline)  Tuesday, October 18 2011 @ 03:51 AM CDT  
myluckystar111

Hi,

My solution to your problem is as follows:

Draw bar model to show :

Total savings = 8 units
Savings spent on watch = 5 units
Savings spent on bag = 2 units (because 1/4 equals to 2/8)

5 units ---> $80
1 unit ---> $80/5 = $16
2 units ---> $16 x 2 = $32

Savings spent on bag = $32

Ans : $32

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By: achieve_goal (offline)  Tuesday, October 18 2011 @ 08:41 AM CDT  
achieve_goal

thanks!

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By: TEOTECKWAH (offline)  Tuesday, October 18 2011 @ 08:48 AM CDT  
TEOTECKWAH

first u need to 80/5=16
then, 16x2=32
ANS:32 Big Grin

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