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Question

Janice and Siti had some money in the ratio 2:3. After each of them spent $32 on a school bag, Janice had 3/5 as much money as siti. How much money did Siti have in the end?

Answer

  Janice Siti
Before 2 units 3 units
Change – 32 – 32
After 3 parts 5 parts

Multiply Janice’s column by 5 and Siti’s column by 3 to equal parts:

  Janice Siti
  10 units 9 units
  – 160 – 96
  15 parts 15 parts

Comparing the two columns:

10 units – 160 = 9 units – 96
1 unit = 64

Siti at first = 3 units
= 3 × 64
= 192

Siti in the end = 192 – 32
= $160

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