It is 70/1.
70% = 7/10 as a fraction in its lowest terms
70% = 7/10
70/100 in lowest terms is 7/10.
70% = 0.7 = 7/10
70% = 70/100 = 7/10
7/10.
7/10
70 is an integer, not a fraction. There is not really a sensible way of writing it as a fraction or mixed number. However, if you must, you can use 70/1.
17/70
7/10
7/10
70/840 reduces to 1/12