Friday 7 October 2011

PLEASE HELP! 7TH GRADE MATH QUESTION!?

please teach me how to do these math problems:

*Find each percent of change. Label your answer as increase or decrease. Round to the nearest tenth of a percent.

1. 18 to 10



2. 86 to 120



3. 43 to 86



4. In 1995, the price of a laser printer was $1,299. In 2002, the price of the same type of printer had dropped to $499. Find the percent of decrease.



I jst wanna know how to do these problems cuz they're for my homework %26amp;%26amp; idk how to do them..thank you sooo much! :D
PLEASE HELP! 7TH GRADE MATH QUESTION!?
well look in ur book
PLEASE HELP! 7TH GRADE MATH QUESTION!?
You put the amount of the change over the original amount then multiply it by 100 to make it a percent.



Like #2, 120 - 86 = 34 so it changed (increased) 34.

34/86 鈥?100 = 39.5% increase
just divide the 10 by 18 to get .55 which is equivalent to 55% and since the first number was higher it decreased 55%.

so answers are:

decreased 55%

increased 71%

increased 50%

decreased 38%
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