Its a Math question, plz help me asap!!!

Question

The ticket booth at a school play sells 140 adult tickets and 210 student tickets. Find the ratio of adults to students. Write your answer as a fraction in simplest form.

Answer 1

140/210=

14/21=

2/3

usually you find the GCF of the two numbers

140=2*2*5*7

210=2*3*5*7

GCF=2*5*7=70

looking at the factorizations, take out 2*5*7 from each and you are left with 2 and 3; 2/3