my answer would be that you could change four thirds is 4.3
1.6666 repeating
1.666666666666666666666666666666667
6.33... recurring.
1.3333 (continues)
66 and two thirds as a decimal = 66.67
1/3 = 0.3333 repeating 2/3 = 0.6666 repeating
1.6 recurring
0.006666 repeating
"Three thirds" is ONE
It cant be written as a decimal apart from 3.0 which is a whole number. The fraction is basically saying that there are 9 thirds which equals three. Three thirds equals one because three thirds equals a whole.
one third of a cup in decimal form is .33 two thirds, .66