Answer:
Steps to simplifying fractions
Find the GCD (or HCF) of numerator and denominator
GCD of 42 and 77 is 7
Divide both the numerator and denominator by the GCD
42 ÷ 7
77 ÷ 7
Reduced fraction:
6
11
Therefore, 42/77 simplified to lowest terms is 6/11.