"the cost of a phone is reduced by 20%. the new cost is $70.40. what was the original price? " plz

This question is incomplete. Here is the complete question:

The cost of a phone is reduced by 20%. The new cost is $70.40 . What was the original price?

1. $88.00

2.$84.00

3.$58.40

4.$56.00

The correct answer is option 1. $ 88.

Step-by-step explanation:

Let's analyze the information we have:

We know that the cost of the product was reduced by 20%, leaving $ 70.4 as the final price.

As we do not know what the original cost of the product is, we will assign an x.

Now, we know that 20% is the reduced cost, so we can logically say that what is left represents the remaining 80%, that is, the $ 70.40.

So, now we will do a cross-multiplication:

If 80% 70.40

   100% --- x

80x = 70.40. 100

80x = 7040

X = 7040: 80

X = 88

This way we can verify that the correct option is $ 88

yes. we do proportions in probabilities.

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation: