Yes you can express 1.2353535...... in p/q form-
let 1.23535... be 'x'
therefore, 100x=123.53535....
Subtract both- 100x=123.53535.... x= 1.23535.....
99x=122.3
thereforex=122.3/99 or, 1223/990
therefore 1.23535 in the form of p/q=1223/990
you can check the answer by dividing 1223 by 990