Question

8. Cassie knit a total of 15 centimeters of scarf over 3 nights. After 4 nights of knitting, how many centimeters of scarf will Cassie have knit in total? *Just type the NUMBER - no label!*

Answer 1

if she knit 15 cm in 3 nights, and we want to find how many cm she would knit in 4 nights, we create the following proportion, calling "x"" the number of cm we need to find

15/3 = x/4

meaning: 15 cm is to 3 nights the same as x cm is to 4 nights

and solve for the unknown "x"

multiply by 4 both sides in order to isolate "x"on the right:

15 * 4 / 3 = x

operate

20 = x

therefore, she sould knit 20 cm in 4 nights.