enter the number of tasks requiring 3/8 of a brain that Shelby can do with the seven eight of her brain which is still awake

2⅓ tasks

Step-by-step explanation:

Shelby has ⅞ of an awake brain.

Each task requires ⅜ of a brain.

No. of tasks = amount of brain/amount of brain needed for each task

No. of tasks = ⅞ : ⅜

Invert the divisor and change divide to multiply

⅞ : ⅜ = ⅞ * ⁸/₃

Cancel the 8s

⅞ * ⁸/₃ = ⁷/₁ * ⅓ = ⁷/₃

Convert to a mixed number

⁷/₃ = ⁽⁶⁺¹⁾/₃ = ⁶/₃ + ⅓ = 2 + ⅓ = 2⅓

So, Shelby has enough brain power to complete two tasks plus one-third of another.