Question
Japheth had 10% as many pens as Peter. After Japheth and Peter bought another 27 pens and 15 pens respectively, Japheth had 60% less pens than Peter. How many pens did Peter have at first?
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Japheth had 10% as many pens as Peter. After Japheth and Peter bought another 27 pens and 15 pens respectively, Japheth had 60% less pens than Peter. How many pens did Peter have at first?