# Question 8a080

Jan 31, 2018

$27 or$63

#### Explanation:

In this problem, $90=100, therefore we need to find 30% and subtract it from the original to get the discount price of 70% of the original. An easy way to find 30% is to find 10% by dividing the original amount by $100$, then multiplying by $3$. 100%=$90

As $\frac{100}{10} = 10$, we can divide by $100$ to find 10%

90/10=$9 Therefore 10%=9 As we want to find 30%, we need to find out how many times $10$goes into $30$$\frac{30}{10} = 3$Therefore we need to multiply the 10% we found by $3$$9 xx 3=$27 This is therefore 30% of the original amount. If you wanted the amount of the discount, the answer is color(red)($27)

But this isn't it, we found 30% but we want 70% of the original amount, so we minus the answer we have from the original:

$90-$27=$63 This is like saying 100%-30%=70% which is the value we want. $\therefore$discounted price=color(red)($63

If you wanted the price after discount the answer is \$63#