Question

Sally collects stamps. Of all her stamps,

45% are from the United States. She has
90 stamps from the United States. How
many total stamps does she have?

Answer 1

90 stamps are .45 of her collection
90/.45=x/1.00
cross-multiply
.45x=90
x=200 stamps, dividing both sides by 0.45

+.45x+=+90+
+x+=+90%2F.45+
+x+=+200+
She has 200 stamps

So 200 stamps she has

Answer 2

200 stamps

Explanation:

Divide the 90 stamps by 45: The result is 2; it's equal to 1% of the total number of stamps. You then multiply it by 100 to get the full amount, which is 200 stamps.