Question

Tim installs 50 square feet of his floor in 45 minutes. At this rate how long does it take him to install 495 square feet.

Answer 1

50 sqft = 45 min
495 sqft = x min

495/50 is 9.9. So we know we multiplied 50 by 9.9 to change it to 495.
Do the same on the other side. 45 x 9.9 = 445.5.

It will take him 445.5 minutes, or 7.425 hours