a. We are told that 3/5 of the devotional books are bible storybooks.
Also, he will move to the display table 1/2 of that fraction.
So, to find the final fraction part of the children's devotional books he moves, we need to find 1/2 of 3/5.
So, we need to multiply the fraction 1/2 by the fraction 3/5:
Thus, the fraction part is
b. Now, notice that the total of devotional books is 100. So, we need to find 3/10 of 100. We do so by multiplying that fraction by 100:
Therefore, the number of bible storybooks he moved to the display table is 30.