Answer :
You add 23 and 17:
23 + 17= 40
Then you find 1/8 of 40:
1/8 * 40/1= 5
23 + 17= 40
Then you find 1/8 of 40:
1/8 * 40/1= 5
[tex]\sf 23+17=40 \\ \\ \frac{1}{8}*40= \frac{40}{8}=\boxed{\sf 5} [/tex]