Hello there, and thank you for posting your question here on brainly.
We can turn the two percentages to decimals to add easier.
15% = 0.15
5% = 0.5
Now we have 15 + 0.15 + 0.5 = ?
When adding, we don't add the 15 at all, just for the first part put a .15 after the 15, then add .15 by 5.
15 + 0.15 + 0.5 = ? ---> 15.15 + 0.5 = ?
15.15 + 0.5 = ? ---> 15.20
15.20 is your final answer.
Hope this helped!! ☺♥
