According to government birth statistics the probability of women giving birth to twins is 0.015 what is the probability of not having twins?

1-0.015=0.985 is the probability expressed as a decimal

Number of twin births: 133,155Number of triplet births: 3,871Number of quadruplet births: 228Number of quintuplets and other higher order births: 24Twin birth rate: 33.5 per 1,000 live births Triplet or higher order birth rate: 103.6 per 100,000 live births