Marcella read 100 books over the school year. 60 of the books were mysteries. She said the mysteries equal 0.06 of the total books. Is she correct?

To determine if Marcella is correct, we need to find the percentage of mystery books in relation to the total number of books she read.

60 mystery books out of 100 total books is a percentage equal to:
(60 / 100) x 100% = 60%

Therefore, the mystery books do not equal 0.06 of the total books, but rather 60% of the total. Marcella's statement is incorrect.

Can you put it in a decimal form and explain

Yes, of course. To convert a percentage to a decimal, you divide the percentage by 100.

60% as a decimal can be calculated as:
60 / 100 = 0.60

Therefore, the proportion of mystery books she read out of the total is actually 0.60, not 0.06 as Marcella originally stated. This means that 60% of the books she read were mysteries, not 0.06%.