Adult Illiteracy Rate Formula

Equation for calculate adult illiteracy rate is,

ILL^t₁₅₊ = [I^t₁₅₊] ÷ [P^t₁₅₊] × 100

where,
I^t₁₅₊ = Adult Illiterate Population (15+) in year t,
P^t₁₅₊ = Adult Population (15+) in year t,
ILL^t₁₅₊ = Adult Illiteracy Rate (15+) in year t