solve for the unknown.
18. what is 30% of 140?
19. what is 50% of 100?
20. what is 85%of 200?
21. what percent of 80 is 32?
22. what % of 100 is 50?
23. 45 is what percent of 450?
24. 18% of number is 60. what is. what is the number?
25. 35% of number is 700?​