It is: 7 to 5 in simplest form
21% can not be put into simplest form. The lowest it will go is 21/100
45/21 = 15/7
0.105 as a fraction in its simplest form is 21/200
21/1 It is a whole number so it doesn't need to be put in simplest form.
5:7
21/20
5/7
0.7
5/21
5/7
15 over 6 as a mixed number in simplest form = 21/2
Expressed as a proper fraction in its simplest form, by dividing the numerator and denominator by 3, 21/45 is equal to 7/15 or seven fifteenths.