Answer:
22
Explanation:
if you constantly divide both numbers by common divisor till you reach 1, you will find the greatest common factor
88-110 /2* = 44-55 /2 = 22-55 /2 = 11-55 /5 =11-11/11* = 1-1
now multiply the divisors that are common (the ones with a star)
2×11 = 22
22 is the greatest common factor for 88 and 110