Is There Any Contradiction In The Verses Of Inheritance In The Qur’an? (11th Book 4th Section)

There is a question that atheists often ask about the question of heritage;   Inheritance according to Nisa verses 4/11,12,176; one man died and left behind three daughters, a mother, a father and his wife. Three daughters will inherit 2/3 of the inheritance, 1/6 for each of the parents and 1/8 for the wife. (2/3)+(1/6)+(1/6)+(1/8