Question

pave the way company is installing a new walkway the installer uses 13 paving stones for every foot of walkway he needs 117 paving stones to complete the project and has used 78 paving stones so far how many more feet of paving stones will he need to install to finish

Answer 1

117 - 78 = 39 paving stones needed to finish
Each foot needs 13 paving stones, so
39/13 = 3 feet of paving needed to finish