Answer:
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.