Twenty one of the 70 acres were planted with alfalfa. what percent of the acres was not planted in alfalfa?

Cynthia takes her dog to the park every 2 days. she bathes her dog every 7 days. if she took her dog to the park and bathed him today, how long will it be until she does both on the same day again?

3382-299=3383- ? fill in the blank?

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction