Question

Eric and his work crew have 50 trees to plant. In 8 hours today, they planted 40 trees. If they work at the same rate tomorrow, how long will it take to finish planting the trees?

Answer 1

Two hours. 
40%8=5 trees per hour. 50-40=10. 10% by 5=2.

Answer 2

It will take them two 2 hours! Take 40 divided by 8. That =s 5. So if they have 10 more trees to plant take 10 divided by 5 and you get 2.