Only the number 1.
Just 1
45 x .64 (64%) = 28.8
64/45 is in its simplest form.
Any multiple of 2880
45 multiplied by 64 is 2,880.
429 ÷ 64 = 6 with remainder 45 or 6.703125 times.
45/64 is already in its simplest form
1.4222
64/90 = 32/45
64.7031
Yes, 45 and 64 are relatively prime because they do not share any prime factors.
45