To simplify the fraction 42/54, you can find the greatest common divisor (GCD) of the numerator (42) and the denominator (54) and then divide both the numerator and the denominator by the GCD to reduce the fraction to its simplest form.
The GCD of 42 and 54 is 6.
Dividing both the numerator and the denominator by 6:
42 ÷ 6 = 7
54 ÷ 6 = 9
So, the simplified form of 42/54 is 7/9.