5 percent (not persent) is 5/100.
It is simply: 345/1 as an improper fraction
30% as a fraction is 3/100
4/5
450% = 9/2
345 % = 345/100 = 69/20.
345/1000 or 69/200
345 is an integer and not a fraction. However, it can be expressed in rational form as 345/1 which is in its simplest form.
3.45 as an improper fraction is 345/100.
Multiply by 100. For example 1/4 is 25%
345/1000
Multiply it by 100 as for example 3/4*100 = 75%