You move the decimal point two places to the right and add on the percent sign.
Answer:
-3/5 x -1.5 = 0.9 or 9/10
485, because the mean means you need to calculate the average. to find the average, you take the smallest number from the data set and the largest number. add the largest number by the smallest number and divide by the set of numbers you added (2). Example: (720+250=970 divided by 2 =485)
i think it is Both grades spend an equal amount of time. online
Add them and you will get the sum of 138