Vivian has 45 songs on her MP3-player, 15 of which are alternative rock and the rest of which are rap. Malik has 60 songs on his MP3-player in the same ratio as Vivian’s songs. How many more rap songs does Malik have on his MP3-player than Vivian has on hers?

Answer 1

Vivian has 2/3 rap.

so, what is 2/3 of 60?
How much more is that than 2/3 of 45?