To subtract two fractions, they must have a common denominator. In this case, the common denominator is 9. So, convert 2/3 to 6/9. Then, subtract 6/9 - 4/9 to get 2/9 as the result.
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Two thirds minus two ninths is 4 ninths. Two thirds is 6 ninths. 6 ninths minus 2 ninths is 4 ninths.
Ninths.
8 3/9 - 5 2/3 = 2 2/3 (that is, two and two thirds).
2 5/9 + 1 2/3 = 4 2/9 or four and two ninths.
Short answer: 42 Longer answer: Convert everything into 9ths. You get 4x9 (36) plus 2/3 x9 (6)