If price of an item before sale is $x a then final price after 30% decrement can be expressed as 0.7x
Percentage is a number or ratio expressed as a fraction of 100.
Given that there is an off of 30% on every item
which means off of $30 on 100$
Which mean a item of worth $100 is now costs only $70
Let suppose price of item is $x
Now decrement in price due to sale = 30% of x
Which is equal to
[tex]\frac{30}{100} \times x[/tex]
[tex]= \frac{3}{10 } \times x\\\\= 0.3x[/tex]
Now final price = price before sale- decrement in price
[tex]=x-0.3x\\\\=0.7x[/tex]
If price of an item before sale is $x a then final price after 30% decrement can be expressed as 0.7x
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