Getting rounded numbers to add up

Hi, hopefully this is a simple one.

I have a formula containing percentages of 11 which I need to result in whole numbers.

I'm adding 41.7% + 35.7% + 15.8% +5.6% + 1.2%. (100%)

This produces rounded figures of

5 + 2 + 4 + 1 = 12

Is there a way for me to get this to result in the correct answer of 11.

Many thanks