fraction in lowest terms 3 ft to 64 in

Answer 1

3 ft/64 in = 36 in/64 in = 9/16

Answer 2

You need to have both numerator and denominator be the same units. So you can either switch 3 ft into inches (36 inches) or you can switch 64 inches into feet (which is 16/3 ft). It definitely would be easier to switch 3 ft into 36 inches.

Then, just reduce the fraction:

36/64 = 18/32 = 9/16