A stock went down 2% to $20. What was it's original price? The answer is not 80. #math #percentages #logicalstation #fastandeasymaths #math #iq #mathspuzzle #maths #brainteaser #mathproblem #percentage
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00:00Welcome everyone. So today we are going to solve a very nice word problem. Here we have a stock went down to 20% sorry a stock went down 20% to $20. What was its original price?
00:16So now at this point when you have something like this we need to see that how do we represent this question in its mathematical form. So let the initial stock price be x and now it has gone down 20%. So 20% of x and after doing that the price has come to $20.
00:40Okay. So now what we will do is we will take x common and we have 1 minus 20 upon 100 is equals to 20. So we have x is equals to 100 minus 20 upon 100 is equals to 20.
00:58So we have x multiplied by 80 upon 100 is equals to 20. Okay. So now what we can do in this case is in order to find the value of x we will multiply this 100 on the other side because here it is getting divided.
01:17And here since the 80 is getting multiplied the other side it will be divided. So this is 1za, 4za, 1za and 25za. Okay. So therefore I can say the original price would be $25. I hope this is very very clear to everyone.
01:37That's it for today. I will see you in the next video.
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