Calculate the Odds Ratio of Developing Colorectal Cancer Related to a Low-Fibre

Calculate the odds ratio of developing colorectal cancer related to a low-fibre diet from the following example. Write a statement that would explain your results to a client.
Study group = 300
Risk factor = low-fibre diet
Disease = colorectal cancer
Persons with low-fibre diet and colorectal cancer = 100
Persons with high-fibre diet and colorectal cancer = 20
Total persons with colorectal cancer = 120
Person with low-fibre diet and no colorectal cancer = 20
Persons with high-fibre diet and no colorectal cancer = 160
Total persons without colorectal cancer = 180