The percentage increase from 15 to 45 .that what got but I don’t know what to do next

Hi my sisters and brothers can tell me the answer because i don’t understand the question

How do i multiply two digit numbers

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.