1
64
Just 1
Only the number 1.
They both are not prime numbers
45 x .64 (64%) = 28.8
64/45 is in its simplest form.
45 multiplied by 64 is 2,880.
45 and 19 are the numbers.
45 and 64 are not prime numbers because they both have more than two factors
1.4222
45/64 is already in its simplest form
64, since its reverse, 46, is not in the series.