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vagabundo [1.1K]
3 years ago
9

a computer computer monitor as regular priced at 3:20 during A2 Day Sale the price was decreased to 2:40 what is the percentage

decrease
Mathematics
1 answer:
ycow [4]3 years ago
7 0
You're looking for the percentage in decimal form in the equation. We'll call it x for right now. So whatever x is it will be multiplied to 3.20 and subtracted from 3.20 to equal 2.40. So, our equation will look like this
3.20-x(3.20)=2.40
subtract both sides of the equation by 3.20 to get
-x (3.20)=2.40-3.20
-x (3.20)=-.80
now divide both sides of the equation by -3.20 to single out x on the left side
x= -.80/-3.20
x=.25
to turn this back into a percentage, we move the decimal to the right 2 places
.25=25%
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