John can eat 10 hot dogs in 4 mins. at this rate, how many hot dogs can he eat in 18 mins?

It deals with proportions. You put hotdogs over minutes.
Like 10 hotdogs over 4 minutes because that's how long it took to eat those hotdogs.
Then put 18 minutes on the bottom of the next fraction.
Then you cross multiply.
10 x 18 which equals 180.
Then you divide. 180/4
Which equals 45 hotdogs.
He ate 45 hotdogs in 18 minutes.
10 hotdogs in 4 minutes
45 hotdogs in 18 minutes.

How much is 32 out of 40 written as a percentage? convert fraction (ratio) 32 / 40 answer:   80%