34/100 + 46/100
Since these have the same denominator, you simply combine the numerators :
34 + 46 = 80
Thus, your answer is
80/100
Now, reduce this to its simplest form. Both 80 and 100 are factors of 20. Thus, lets reduce to get
80/100 = (4 * 20) / (5 * 20) = 4/5 * 20/20 = 4/5 * 1 = 4/5
