The total fraction of what Tarik and his sister ate was 17/30 of the cookies
Total fraction means To add the fractions of what was eaten
Let whole cookie be represented as 1 whole
Since Tarik ate 2/5 of the cookies and
His little sister ate 1/6 of the cookies
Therefore altogether both of them ate 2/5 + 1/6 = 12 +5/30=17/30
This 17/30 is the simplified fraction( a fraction can can no longer be reduced ) that represents the total fraction of what they ate
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