Answer:
7:6
Step-by-step explanation:
Dalmatian: 72
Bullmastiff: 72 + 24
= 96
Bulldog: 96 - 12
= 84
Bulldog : Dalmatian
84 : 72
^ Simplify
7 : 6
7
form a proportion
12/2=42/x
cross multiply
12x=84
x=7
11