60% of a museum fossils are from the Jurassic period. If the number of fossils from the Jurassic is 15,what’s the total number of fossils at the museum

The total number of fossils at the museum is 25. If you divide 15 by 60%, you get 25. To check to see if that makes sense, multiple 25 by 60% and you should get 15. By getting 15, you now have 60% of the total fossils at the museum, proving that the total amount of fossils is 25.

$699 is the total.

You have 2 items that you bought.

Divide $699 (the total cost) by 2 (the two items). Do this to figure out how much each of them will cost (approximately) separately.

Now you have each item costing $349.50.

But, they tell you your washer costs $51 LESS than your dryer did.

So you subtract $349.50 - $51 to get $298.50 for the washer.

Since you subtracted $51 dollars from the washer, add $51 to the dryer to even it out:

Dryer = $349.50 + $51

Dryer = $400.50

You know to add this $51 to the dryer’s cost after you subtract $51 of the washers cost because once you take away that $51 from the washer, you total cost for both items would have been $648. But, they tell you your total cost was $699, so you know you have to put that $51 lost somewhere else.

The dryer costs MORE than the washer, because they tell you the washer costs LESS then the dryer. So you add $51 dollars to the dryer after subtracting $51 of the washer’s cost to get:

dryer= $400.50.