How do you convert 0.40 (40 repeating) to a fraction? Prealgebra Fractions Equivalent Fractions and Simplifying 1 Answer Shwetank Mauria Jun 6, 2016 #0.4040404040........=40/99# Explanation: Let #x=0.4040404040........#, hence #100x=40.4040404040........# Subtracting first from second #99x=40# Hence #x=40/99# Answer link Related questions What is 0.098 divided by 7? How do you find the fraction notation and simplify 16.6%? How do you convert #0.bar(45)# (meaning the #45# is being repeated) to a fraction? How do you convert 8/15 to a decimal? How do you express #3/4, 7/16,# and #5/8# with the #LCD#? How do you simplify fractions? What is the simplified form of #30/42#? How do you subtract and simplify #9-5 1/3#? How do you add and simplify #5/7 + 3/4#? What is 0.17 in fraction form, simplified? See all questions in Equivalent Fractions and Simplifying Impact of this question 9235 views around the world You can reuse this answer Creative Commons License