just look at what .365 means
.365=.3+.06+.005
recall that .3 means 3/10
and .06 means 6/100
and .005 means 5/1000
so .365=3/10+6/100+5/1000
we need a common denominator, which here, will be 1000
so multiply 3 and 10 by 100 to get 300/1000
then multiply 6 and 100 by 10 to get 60/1000
then add:
300/1000+60/1000+5/1000
now add terms in numerators (300+60+5=365)
and throw that over the denominatorl
so .365=365/1000
now reduce it:
365=5*73
1000=5*200
so 365/1000=73/200