515/8
Multiply the top and bottom numbers and you get 3/64.
1/64
7-1/9=64/9
-64
4mm is about 0.157480315 inches, *64 is just over 10, so 10/64 (5/32) is the closest fractional size.
Expressed as a proper fraction in its simplest form, by dividing the numerator and denominator by 8, 8/64 is equal to 1/8 or one eighth.
16/25
It is 64/93.
The factors of eight are three 2's. Eight squared is 64 (8 x 8). So the factors of 64 are six 2's.
8/64 = 1/8
This is exactly the same as doing 1/8 x 21/8 so the answer is 21/64
71/64 or 1 and 7/64