Please help me with this 7th-grade math work.

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

Ineed if you could explain and give me the answer you! this needs done

Landon wrote that 3−2.6=4. which statement about his answer is true?