Please please help!! it’s geometry and im struggling really badly

Assume that a population of 50 individuals has the following numbers of genotypes for a gene with two alleles, b and b: bb = 30, bb = 10, and bb = 10. calculate the frequencies of the two alleles in the population’s gene pool.

9/10 divide by -3/15 as a mixed number

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1