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Anna and Liz had some toys in the ratio of 2:5.
Anna's father buys a few more toys for her.
As a result, the number of toys that Anna has increases by 75%.
(a) Liz gave away some toys such that she now has the same number of toys as Anna. What is Liz's percentage decrease in her number of toys?
(b) If Anna had 70 toys in the end, how many toys did Liz have at first?
Notes to students: