Can anyone help me solve the following problem? Please include the formula:
A computer is on sale for $1600, which is a 20% discount off the regular price. What is the regular price?
Can anyone help me solve the following problem? Please include the formula:
A computer is on sale for $1600, which is a 20% discount off the regular price. What is the regular price?
It's all based on this:
X% of Y is Z
There are two ratios here: X% is X/100
The number after of is the denominator Z/Y
Thus X(%)/100 = (is)Z / (of)Y
Fill in the blanks. What do you get?
I do it by simple proportion.
100% is the regular price.
20% off is the discount
So, 80% is the sales price.
80% makes up $1600
1 % therefore makes up 1600/80 = $20
So, how much does 100% make up?
sale price=(1-%)first price
1600=(1-0.2)p
1600=0.8p
divide by 0.8 or multiply by 1.25
2000=2000
very simple
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