How do you simplify #4/5+2/9#? Algebra Properties of Real Numbers Addition of Rational Numbers 1 Answer Suren Abreu Nov 23, 2016 #46/45# or #1 1/45# Explanation: #4/5+2/9# The LCM (Lowest Common Multiple) of #5# and #9# is #45#. #((4xx9)+(2xx5))/45# #(36+10)/45# #46/45# or #1 1/45# Answer link Related questions How do you add rational numbers? How do you write fractions with a common denominator? How do you write mixed fractions into improper fractions? How do you write #11 2/3# into an improper fraction? How do you add #4 1/7 + 2/7#? How do you add #3/5+2/8#? How do you change fractions into decimals? How do you find the sum of #2.5+2.57+3.1#? How do you calculate #18/12 - 7/9#? How do you write 5 into an improper fraction? See all questions in Addition of Rational Numbers Impact of this question 3465 views around the world You can reuse this answer Creative Commons License