Pls help me answer these question pls

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Write 17/20 as a decimal and as a percent.

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period.value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?