Question
Anna and Yoko collected erasers. Anna gave 25% of her erasers to Yoko.  As a result, Yoko's erasers increased by 70%. If Anna had 231 erasers left, find the total number of erasers the two girls had at first.
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Anna and Yoko collected erasers. Anna gave 25% of her erasers to Yoko.  As a result, Yoko's erasers increased by 70%. If Anna had 231 erasers left, find the total number of erasers the two girls had at first.