I am trying to figure out some mineral interest. This is an example of what I am trying to calculate:

Rose has 55% of 1/2 of undivided 153.15 acre interest in 633.15 - .00727547 June has 45% of 1/2 of undivided 153.15 acre interest in 633.15 - .00595266 John has 1/8 of 3/4 of 1/2 of undivided 153.15 acre interest in 633.15 - .00141730

I am trying to calculate the mineral interest to come up to what is on the right side. But, I am not coming up with that number. Can you help?