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1/2 + 1/15 = 15/30 + 2/30 = 17/30
Expressed as a proper fraction in its simplest form, by dividing the numerator and denominator by 2, 2/30 is equal to 1/15 or one fifteenth.
84,000,000 to the fifteenth power
5/15 = 1/3
1/5 ÷ 1/15 = 3