text: You have to divide each molar amount by the lowest value and try to obtain small integers\ncarbon: 0.889 / 0.333 = 2.669\nhydrogen: 0.890  / 0.333 = 2.673\noxygen: 0.333 / 0.333 = 1\n\nAs 2.669 and 2.673 are close to 2.666.... multiplying each one by three will do the trick. The empirical formula of the substance is C8H8O3