I'll help you get started, 'though I won't solve all these problems for you.
"What percent of 84 is 12?" Write the fraction 12/84 and then mult. the resulting decimal fraction by 100%:
0.1429(100%) = 14.29%
"What number is 35% of 72?"
Let the number be n. Then 0.35(72) = 25.2 (answer)
If you'll try some of the others and share your work, I'd be glad to comment on your efforts.
