Question

what is the simplest form of (64/729)-1/6

Answer 1

64/729-1/6
=(64x6-729x1) / (729x6)
=(384-729) / 4374
= -(115/1158)

Answer 2

64 = 8 × 8
729 = 27 × 27
$\frac{64}{729} - \frac{1}{6} = \frac{128 - 243}{1458}$
$\frac{-115}{1458}$