55:100

Convert the ratio to a fraction by making the left side of the ratio the numerator and the right side the denominator.

55100

Factor 5 out of 55.

5(11)100

Cancel the common factors.

Factor 5 out of 100.

5⋅115⋅20

Cancel the common factor.

5⋅115⋅20

Rewrite the expression.

1120

1120

1120

Convert to a Fraction 55:100