BB help (if u have the book)

Test Preparation SAT Preparation
1

<p>Hey guys, I need some help with pp.399 #15, 400 #18 and pp. 491 # 16.</p>

<p>on 339: 15 It's not really a hard problem, I didn't understand why it wasn't B.
Thanks!</p>

2

<p>You need to know that the percent change from one number to another is defined to be:</p>

<p>% change = (second number - first number) / (first number) * 100 …</p>

<p>Hope this helps!</p>