4 (same as 5 - 1)
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5050
3/15 is equal to 1/5, therefore, 1/5 plus 1/5 would equal 2/5
a is equal to 1.
six fifteenths
5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 9 + 9 + 9 + 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 = 43