Math the number to the value of its 5

Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?