GENEROUS JENNY

PROBLEM STATED. Jenny withdrew all of her from her savings account at the bank. After giving 10% percent to her sister, she spent 1/3 of what was left on a book and then gave the remaining $72.00 to a local animal shelter. How much money did Jenny's sister get?

UNDERSTAND

• She gave 10% of the money to her sister
• Then spent 1/3 of her remaining 90% on a book
• The left over 60% = 72
• How much money did she give to her sister?

PLAN. We will just follow these steps, and set up a proportion to find x, the amount of money jenny gave to her sister

SOLVE

• 100% - 10% = 90%
• 1/3 of 90% = cost of book (30%)
• 90% - 30% = 60%
• 60% = $72.00
• 72/60 = x/10

SOLVE 2

• 72/60 = x/10
• Next divide 72 by 6 as that is our proportion
• This gives us x as 12
• This means x = 12
• So jenny gave 12 dollars to her sister

CHECK

• 10% * 6 =60%
• 10% = $12, 60% = (12*6) = $72
• 60%/2= 30% so $72/2= $36
• $72 + $36 + $12=$120
• So Jenny's sister got $12.

THANKS FOR WATCHING