121 = 1.21 x 102
i think...
648 = 23 x 34
34 17,2 No exponents required.
20, 21, 22
One hundred and twenty-one
121 = one hundred twenty-one.
42/121 is in its simplest form.
121/182 is in its simplest form.
It is 121/100.
121 = one hundred twenty-one.
121/200 is in its simplest form.
121/90 is already in its simplest form