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Answer :
Let the marked price of the skates be ₹ 100
We are given discount = ₹ 20% of 100 = ₹ 20
So the Sale price =₹ 100 – ₹ 20 = ₹ 80
If SP is ₹ 80 then marked price =₹ 100
so,if SP is ₹ 1 then marked price = ₹ \(\frac { 100 }{ 80 }\)
Similarly, if SP is ₹ 1,600 then marked price = ₹ \(\frac { 100 }{ 80 } \times 1600 = ₹ 2,000\)
Hence, we got the marked price = ₹ 2000.