need help

Cheryl Rotnem

I've attached a snippet of my start to make a swing card. I need to know how to cut the oval on left to 2 7/8" and on right to at 3 7/8 leaving the middle part attached. I got my score lines ready just can't think how to do this part.
Thanks In Advance to whoever helps me,

Cheryl Rotnem, CZT 11
Certified Zentangle® Teacher

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