How do i find the ratio of the numbers 1,250 to 750? and how?

1250 : 750
then u reduce to the lowest terms
:. divide both by the highest common factor (HCF) of both = 250
1250/250 : 750/250
:. ratio is 5 : 3

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct