How-to books make up 0.3 of the books in the school library. Of these, 0.2 deal with carpentry and 0.4 deal with electronics.
0.3×0.4=0.12
The product of 0.3 and 0.4 is 0.12.
Interpret what the answer 0.12 represents in this equation above
To calculate the number of books in the school library that deal with both carpentry and electronics, we multiply the overall percentage of how-to books (0.3) by the percentage of how-to books that deal with electronics (0.4).
0.3 * 0.4 = 0.12
Therefore, 0.12 (or 12%) of the books in the school library deal with both carpentry and electronics.
To get the answer, you need to multiply the decimal representation of the fractions. In this case, we are looking for the percentage of books in the school library that deal with both electronics and carpentry.
First, multiply the decimal representation of the fraction of books that are how-to books (0.3) by the decimal representation of the fraction of how-to books that deal with electronics (0.4).
0.3 * 0.4 = 0.12
Therefore, 0.12 or 12% of the books in the school library are how-to books that deal with both electronics and carpentry.