Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**babyangel1972****Member**- Registered: 2005-12-12
- Posts: 18

Between the years 1999 and 2003 the average text book rose from $45.00 to $67.00/ What is the percent of increase (rounded to the nearest whole number) for the average text book.

Offline

**mathsyperson****Moderator**- Registered: 2005-06-22
- Posts: 4,900

Percentage increase = (new amount - old amount)/old amount.

So in this case, it would be (67-45)/45 = 22/45.

Multiply this by 100% to get a percentage and you get an increase of 49% to the nearest whole number.

Why did the vector cross the road?

It wanted to be normal.

Offline

**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,603

Babyangel, maybe you could post future questions below here (click "Post Reply") , so that we can get a "BabyAngel" discussion going, and help you along better.

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

Offline

Pages: **1**