The ratio of Liling’s money and Yingqi’s money was 7:4. When Liling gave $100 to Yingqi, the ratio became 5:6. How much money did Liling have at first?
Solution
Liling : Yingqi
7 : 4 (before ----- 11 units)
5: 6 (after ----- 11 units)
As can be seen from above, 2 units were given.
2 units ----- $100
1 unit ----- $100 divided by 2 = $50
(Liling at first) 7 units ----- 7 x $50 = $350
Answer: Liling had $350 at first.
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