Plz im being time what is the reciprocal of 6 1/4 ?

4/25
1/64
−6 1/4
−42/5

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

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

The total number of dental clinics total for the last 12 months was recorded