Is 291.87 a rational or irrational number?

291.87 is a rational number.
Rational numbers can be expressed by a ratio of two integers; in other words, rational numbers can be written as a whole number, fraction, or percentage. An irrational number cannot be expressed this way. Examples of irrational numbers include √2 and π. Examples of rational numbers include 3/4, 48%, and 58.09.

Hope this helps! :)

Rational because it doesn’t go on without a pattern

As you've got 15%, the best thing to do is to find 10%, then multiply it by 1.5. Once you've found the tip, you add this onto the cost of the meal.
Therefore, the total cost of $25 meal with a 15% tip is $28.75
Hope this helps :)