v = adjusted equalized weighted assessed valuation for the community, as defined in § 16-7-21(3).
V = sum of the values of v for all communities.
m = average daily membership of pupils in the community as defined in § 16-7-22 .
M = total average daily membership of pupils in the state.
E = approved reimbursable expenditures for the community for the reference year minus the excess costs of special education, tuitions, federal and state receipts, and other income.
Then the state share entitlement for the community shall be RE where R = 1 - 0.5vM/(Vm) through June 30, 2011, and R = 1 - 0.475 vM/(Vm) beginning on July 1, 2011 and thereafter.
Except that in no case shall R be less than zero percent (0%).
R.I. Gen. Laws § 16-7-20