If a shirt costs 64 Rs. After 20% is allowed, what was its original price?

If a shirt costs 64 Rs. After 20% is allowed, what was its original price?
[A]76.80 Rs.
[B]80 Rs.
[C]86.80 Rs.
[D]88 Rs.

80 Rs.
If the original cost of shirt be x, then
x\times \frac{80}{100} = 64
=> x = \frac{64\times 100}{80} = 80 Rs.
Hence option [B] is the right answer.

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