JEE Main 2021 Chemistry question

Sucrose hydrolyses in acid solution into glucose and fructose following first order rate law with a half-life of 3.33 h at 25°C. After 9 h, the fraction of sucrose remaining is f. The value of is . (Rounded off to the nearest integer) [Assume : ln 10 = 2.303, ln 2 = 0.693]