Aprice of a at usually cost £50 is increased to £65. work out the percentage increase

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?

What rule describes a dilation with a scale factor of 4 and the center of dilation at the origin?