ok so 30 1/3% is equal to 30.33% because you have your initial 30% plus the 1/3 extra. 1/3 = 0.33. this percentage can be repeated by a decimal value of 0.3033
now to find the percentage all you have to do is multiply the percentage (that we now made into a decimal) with 3.
the product is .
0.9099 which is approximately 0.91
ANSWER: 30 1/3% of 3 is 0.91