Respuesta :
1/3 is equivalent to the repeating decimal 0.333333...
To obtain the repeating decimal for 2/3, just multiply this result by 2:
2(0.333333... ) = 0.666666...
2/3 is 1/3 + 1/3
So if you know the decimal for 1/3, you can add the two numbers together to get what 2/3 is.
1/3 = 0.33 (rounded)
2/3 = 0.66 (rounded)
0.33 + 0.33 = 0.66 (True) ∴ 1/3 + 1/3 = 2/3
hope this helps