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After find the amount that was deducted, we added this amount to the final amount to get the initial amount of petrol

The price before the cut is 90 cents

Numbers and Percentages

Given Data

  • Percent cut = 5%
  • Final Amount = 85.5 cents

Let the initial cost be x

Let us find 5% of x, this is so that we know how much was deducted from the initial amount

Amount deducted = 5/100*x

Amount deducted = 0.05x cents

We know that the initial amount is

x = Amount deducted +  Final Amount

x = 0.05x + 85.5

let us find x

x-0.05x = 85.5

0.95x = 85.5

divide both sides by 0.95

x = 85.5/0.95

x = 90 cents

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