We know that 100% = 1. Then: 15.5 % = 0.155 ( as a decimal ). Then we can transform 0.155 to the fraction ( also in the simplest form). 0.155 = 155 / 1000. We can divide the numerator ad the denominator of the fraction by 5: 155 / 1000 : 5 / 5 = 31 / 200 ( as a fraction. Answer: 15.5 % vis 31/200 as a fraction and 0.155 as a decimal.Hope I helped! :) Cheers!