Answer:
$600
Step-by-step explanation:
We can write a proportion. We know that $420 is 70% of an unknown original price. Let's call it x. We write equal ratios of [tex]\frac{70}{100}[/tex] comparing percent and [tex]\frac{420}{x}[/tex] comparing the $420 to the original price. We then set them equal.
[tex]\frac{70}{100} =\frac{420}{x}[/tex]
We then cross multiply across the equal sign from numerator to the opposite numerator.
70(x)=420(100)
70x=42000
We divide to find x.
x=600.
