Final answer:
To find the fraction of bones in the hands or skull out of the total bones in the body, we add the number of bones in the two hands (60) to the number of bones in the skull (22) to get 82. Dividing this by the total number of bones in the body (206), we get 41/103, meaning about 41/103 of the bones are in hands or skull.
Step-by-step explanation:
To find the fraction of the bones in your body that are in your hands or skull, we need to first know the total number of bones in the human body and then the number of bones in each hand and in the skull. An adult human body typically has 206 bones. As per the student's question, the hands have about 1/4 of the bones, and separately, the skull contains 22 bones.
Since each upper limb consists of 30 bones (1 humerus, 1 ulna, 1 radius, 8 carpals, 5 metacarpals, and 14 phalanges), and knowing that there are two upper limbs, the total number of bones in both hands is 2 × 30 = 60 bones. Given that the hands account for 1/4 of the body's bones, we confirm that 60 is indeed 1/4 of the total. Now, to find the fraction for both hands and the skull, we add the number of bones in the hands to those in the skull.
Therefore, the total number of hand and skull bones is 60 (from the hands) + 22 (from the skull) = 82 bones. To find this as a fraction of the total body, we write 82/206, which simplifies to 41/103. So, about 41/103 of the bones in your body are in your hands or skull. To confirm this as an equation, we might have:
(Total Bones in Hands + Total Bones in Skull) / Total Bones in Body = Fraction of Bones in Hands or Skull
(60 + 22) / 206 = 41/103