This document outlines a chemistry investigatory project comparing the rate of fermentation of wheat flour, gram flour, rice flour, and potato using yeast. The aim is to compare the fermentation rates of the different samples. The introduction provides background on fermentation. The procedure involves taking each sample and adding malt extract and measuring the time until fermentation is complete, indicated by a lack of color change with iodine solution. The observations show that rice flour took the longest to ferment at 15 hours, while wheat flour took the least time at 10 hours. In conclusion, rice flour had the slowest fermentation rate while wheat flour was fastest.