Where and how are percents used in real life?

It could be used for products. People could say, "These are 30% off", "They (any product) have been increased by 15%"

In psychology (i am currently doing psychology), they usually like the results in percentages, especially in the discussion part, where you discuss the results. You would say that (this is an example from my recent report):

"The participants that utilised divided attention got an average of 1.6 answers correct, compared to participants who utilised selective attention, who got on average, 4.7 answers correct. This is a 63% decrease"

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.