The correct option is C 1520
Given ratio is 15:20
Write the ratio as a fraction by writing the antecedent of the ratio as the numerator, and the consequent of the ratio as the denominator.
15:20→1520
Simplifying the fraction, we get
=3×54×5
Cancel out the common factors, we get
=34
Hence, 15:20 can be written as 1520 or 34 as a fraction.