An expression is just like an equation but without the equal sign.
His average speed per minute is 1,448 meters per minute, and there are 60 minutes in a single hour. You would multiply 1,448 by 60 to get the answer of 86,880 meters per hour.
M=rise over run
27 over 36 in lowest terms
Or 27/36
Like if the number is 4,359
You write 4 times 1,000+ 3times 100+ 5times 10+ 9 times 1