Question

6 over 35 r = 18 over 25

Answer 1

6/35 * r = 18/25
6r = 126/5
r= 21/5

Answer 2

6/(35r) = 18/25
r = 5/21 ---->*
------------------
Note to @jazy0512 --> It is important to post questions so that it is clear which terms are in the numerator and which are in the denominator.