Question

When comparing fifteen thirty-seconds to one-half using mental math, what fraction is useful?

sixteen thirty-seconds

fifteen-halves

fifteen-thirtieths

thirty-two sixty-fourths

Answer 1

fifteen thirty-seconds = 15/32
one-half = 1/2
in order to compare you must have same denominator
1/2 = 16/32

and since 15/32 < 16/32 then 15/32 < 1/2

so you use sixteen thirty-seconds