First reduce 90/120, then multiply the results with 1.5/1.

one way to do this would be..

90/120 x 1.5/1

= (90 x 1.5) / 120

= 135 / 120

then reduce this fraction. Both 135 and 120 are divisible by 15, so divide both top and bottom by 15:

= 9 / 8

24*5