Question

Kathleen studied 2/3 of the night's in the month. If the month has 30 days, how many nights did she study?

Answer 1

Two thirds of thirty is twenty.
thirty days in a month so split into three is 10 per third

Answer 2

This is a proportion problem.
2/3= x/30
Cross multiply and divide
30 x2= 60
60 divided by 3 is 20
Answer is 20


Ps: you could also find the answer by dividing 30 by 3 and that's how you get 1/3 of 3 which is 10. So 2/3 is just 10 + 10= 20