Fractions whose values are between 9/20 and 13/25

Answer this question! 30 points and brainliest!

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

Indicate the formula for the following conditions: p^c(n, r)=