Let x be the total price of basket of watermelons including tax.
We have been given that Tiffany buys a of basket of watermelons on sale for $9. The sales tax is 9%. So our total price will be 9 plus 9% of cost of watermelons' basket ($9).
Therefore, Tiffany will pay $9.81 for the basket of watermelons.
We know that percentages are out of 100. The rose garden is 20 percent of the garden. Which is 20 percent/100 percent. A ratio says how much of one thing there is compared to another thing. Therefore we are comparing 20:100. You can also simplify this ratio to 1:5