This is a proportion problem. Eric earned 60 out of a possible 75 points, so the ratio is 60/75. You put that equal to x, so 60=x% and 75=100%. So it would look like <u>60</u> = <u> x </u><u> </u>75<u /> 100 then you cross multiply 60 and 100, and 75 and x, so you get 6000=75x then divide by 75 and you have your percent :)
You change a fraction into a percentage by multiplying by 100.
So, for example, half is 1/2. Multiply by 100 gives 100/2=50. So half is 50%.
Here we know that Eric earned 60 points out of a possible 75. So the percentage is: 60 (the points he earned) / 75 (possible score) * 100 = 6000/75 we can simplify by dividing the numerator and denominator by 5 = 1200/15 and simplify again by dividing both by 5 = 240/3 = 80. So Eric got 80%
The average rainfall when you add all 10 years of rainfall up and divide by 10 is an average of 59.946 inches of rain each year. The equation for the data is y = -0.53x + 64.45, this means that the rainfall is getting less each year at a -0.53 inches of rain each year.