Question
The ratio of Rachel's pens to Zoey's pens at first was 2 : 5. After Rachel gave Zoey 78 pens, the ratio of Rachel's pens to Zoey's pens is 1 : 4. What was the number of pens they had in total?
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The ratio of Rachel's pens to Zoey's pens at first was 2 : 5. After Rachel gave Zoey 78 pens, the ratio of Rachel's pens to Zoey's pens is 1 : 4. What was the number of pens they had in total?