What is the original price if there is a discount of 70% and it is on sale for $1.50

the original price before the discount would be $5.00

checking the work:

if the original price is $5.00 and you want to find the discount if its 70% then you would first have to find how much you save from the discount.

5 x 70/100

3.5

so you would save $3.50 and if you wanted to find the new discounted price you would take away $3.50 from $5.00

5 - 3.5

1.5

therefore, $1.50 is the discounted price IF the original price was $5.00

The original price 2.55