Given,
The fraction is,

To get the denominator equals to 20.
Divide the 20 by the denominator of the given fraction.

Multiplying 5 in numerator and denominator of the given fraction,

The fraction has denominator 20 equal to given fraction is 5/20.
Similarly,
The second fraction is,

To get the denominator equals to 20.
Divide the 20 by the denominator of the given fraction.

Multiplying 2 in numerator and denominator of the given fraction,

The fraction has denominator 20 equal to given fractionis,

Hence, the fraction equivalent to 1/4 with denomintor 20 is 5/20 and the fraction equivalent to 11/10 with denomintor 20 is 22/20.