PLEASE HELP ITS URGENT I HAVE 3 MINS AND IM FAILING I REALLY NEED A A ASAP PLEASE HELP

Which number produces a rationale number when multiplied by 1/5

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest