Final answer:
To find the other number that adds up to 100 when one of the numbers is 67, subtract 67 from 100. The other number is 33.
Step-by-step explanation:
The student has asked for help finding the other number when we know two numbers add up to 100, and one of the numbers is 67. To find the other number, we subtract the known number from the total sum.
So, we perform the following calculation: 100 - 67 = 33.
Therefore, the other number is 33.