what is the simplest form 8/22
16/24,9/21/,20h/24h using product of prime factors.
Look for prime factors that appear in both numerator and denominator, and cancel them out. For example,
8/22 = (2*2*2)/(2*11) = 2*2/11 = 4/11
Now you try the others. The common prime factor in 9/21 is 3.