Yes - as 11 is a Prime number, the proper fraction 11/21 cannot be expressed in a simpler form.
3over7
Expressed as a proper fraction in its simplest form, 68.75% is equal to 11/16 or eleven sixteenths.
Expressed as a proper fraction in its simplest form, 7.011 is equal to 7 11/1000 or seven and eleven thousandths.
Expressed as a mixed number in its simplest form, 75/16 is equal to 4 11/16 or four and eleven sixteenths.
Expressed as a proper fraction in its simplest form, 44 percent is equal to 11/25 or eleven twenty-fifths.
Expressed as a proper fraction in its simplest form, 0.055 is equal to 11/200 or eleven two hundredths.
Expressed as a ratio in its simplest form, by dividing the antecedent and consequent by 3, 33:18 is equal to 11:6 or eleven to six.
Expressed as a proper fraction in its simplest form, by dividing the numerator and denominator by 5, 55/90 is equal to 11/18 or eleven eighteenths.
Expressed as a mixed number in its simplest form, 122 percent is equal to 1 11/50 or one and eleven fiftieths.
Expressed as a proper fraction in its simplest form, by dividing both the numerator and denominator by 3, 33/90 is equal to 11/30 or eleven thirtieths.
Expressed as a mixed number in its simplest form, 11 38/54 is equal to 11 19/27 or eleven and nineteen twenty-sevenths.
Since 11 is a prime number, the proper fraction 11/12 is already expressed in its simplest form.