Frac 1 3 3 frac 3 4 - frac 1 12 July 8, 2019 16 32 64 128 Frac 1 3 + 3 frac 3 4 - frac 1 12 Frac 1 3 Frac 1 4 Frac 2 3 - frac 1 2