Jessica wrote a long letter to her aunt and needed to put stamps on it to mail it. She used eight pieces of paper that weigh 1/5 of an ounce each, and her envelope weighs 2/5 of an ounce. She needed one stamp per ounce. How many stamps did Jessica need to mail her letter?
Jessica’s papers weigh 8 * 1/5 = 8/5 ounces.
The papers in the envelope weigh 8/5 + 2/5 = 10/5 = <<8/5+2/5=2>>2 ounces.
Thus, Jessica needs 2 * 1 = <<2*1=2>>2 stamps to mail her letter.
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