SOLUTION: respected sir, 1] A student first reduced a certain number by 20% and then increased it again by 20%. If the difference between the last number and the original number was 8, th

Question 198253: respected sir,
1] A student first reduced a certain number by 20% and then increased it again by 20%. If the difference between the last number and the original number was 8, then the original number was:

plz help me to solve this % sum...
thank u...
Answer by arallie(162) (Show Source): You can put this solution on YOUR website!
I change the 20% into 80%,when reducing, because it makes it easier to work with.
ie
A student first reduced a certain number (henseforth called x) by 20%...

...and then increased it again by 20%.

If the difference between the last number and the original number was 8...

...then the original number was:

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