Final answer:
To find out what number 270 is 90% of, set up and solve a proportion: 270/x = 90/100. Cross-multiplying gives you: 100 * 270 = 90 * x. Solving for x, you get x = 300.
Step-by-step explanation:
To find out what number 270 is 90% of, you can set up and solve a proportion. Let x represent the unknown number. The proportion would be: 270/x = 90/100. Cross-multiplying gives you: 100 * 270 = 90 * x. Solving for x, you get x = (100 * 270) / 90 = 300.
Learn more about Proportions in Mathematics