13. 30% of what number is 97 14. 50% of what number is 11? 15. 25% of what number is 20? 16. 60% of what number is 217 17. 75% of what number is 127 18. 10% of what number is o? 19. 120% of what number is 48? 150% of what number is 75? 21. The length of a rectangle is lo inches. If the width 50% of its length, what is the width of the rectang 20.​