If you would like to know what is - 13/25 as a decimal, you can calculate this using the following step:
- 13/25 = - (4*13)/100 = - 52/100 = - 0.52
Result: - 13/25 as a decimal is - 0.52.
So you subtract 180 from 90 you get you answer then you will divide it by 55 and your remaining answer which you will get will be x
Ummmmmmmmmmmm your picture inst showing