First divide 160% by 100 to express it as a decimal value:
160/100= 1.6
Now multiply it by any value until you reach an integer:
Best is to start with the lower values, for example:
1.6*2=3.2
1.6*3=4.8
1.6*4=6.4
1.6*5=8
Then to determine the fraction do the opposite operation (division)

The fraction equivalent to 160% is 8/5