Answer:
6/10 i think
Step-by-step explanation:
625 divided by 15 is 41.6 so i'd be 40+1+6/10

which means there is some integer

for which

.
Because

and

, there are integers

such that

and

, and

We have

, which means there are four possible choices of

:
1, 42
2, 21
3, 14
6, 7
which is to say there are also four corresponding choices for

:
9, 378
18, 189
27, 126
54, 63
whose sums are:
387
207
153
117
So the least possible value of

is 117.
6z - 4 = 60
6z = 64
z = 10.66666666666666 (repeating)
The simplest form of 36/64 is 9/16
To solve, devide the whole equation by the gcm which, in this contex, is 4
that leaves you with 9/16 which cannot be simplified anymore.