Tuesday, July 27, 2010

Introduction for percent difference

Introduction for percent difference:

The word “percent” is consequent from Latin. It was at first “per centum”, which means “by the hundred”. Thus the statement is frequently complete that “percent means hundredths”.

Percentage deals with the collection of decimal fraction whose denominators are 100 – that is, fractions of two decimal spaces Since hundredths be used so regularly, the decimal position was drop and the symbol % be located after the number and understand “percent”. Thus, 0.25 and 25% represent the same value, 25/100. The first is read “25 hundredths”, and the second is read “25 percent”. Both mean 25 parts out of 100.

Originally, percent is used in discussing relative values. For example, 25 percent may convey an idea of relative value or relationship

Find Percent Difference Steps and Example Problems:

Steps for find percentage difference:

STEP 1: Start the percentage x/100 = is/of. X is the percentage (over 100 of course), "is" refers to fraction, and "of" refers to entire.

STEP 2: In the question "80 is to 40 percent of what number? x=40, is=40 ("80 is"), and of = the unknown ("of what number"). Therefore write 40/100=80/x. This will also help us on pyramid of numbers

STEP 3: Cross multiply. You will have a constant value on one side and multiply a variable on the other side. Here it is 40x=8,000.

STEP 4: Solve for x. Here, x = 8,000/40 = 400, So x = 400.

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