Friday, October 1, 2010

Finding a quantity when given in percentage of it

 In this lesson we're going to learn finding a quantity when given in percentage. In some question, you need to find the original quantity in percentage that's one we're going to have a look today. Also this also called the unitary method.

 1. Our first example is "If 7% of an amount is $56, what is the total amount?"
7% of an amount = $56          We divide by 7 equally.
1% if an amount = $8.             Then we multiply by 100 equally.
100% = $800

2. Second example is "Jake spend 25% of his total savings on a new game console which it cost $360. What was his original saving?"

25% = $360          We divide by 25 equally.
1% = 14.4             Then multiply it by 100 equally.
100% = $1440

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