34
306
183.6
306
0.0065
0.918
131.1429
18
Instead of "out of" say divide. 918 divided by 3400 can be written as a fraction where 918 is the numerator and 3400 is the denominator. When you divide, you get 0.27. When you multiply 0.27 by 100 you get a percentage, so 918 is 27% of 3400.
153
918 divided by 18 equal 51.
If that's 9 and 18, the GCF is 9.