Dinesh deposited 12.5 percent of his salary in a bank. He spent 80percent of the remaining amount and is left with rs 3500in his pocket. Find his total earning.
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Given,
He deposited 12.5% of his salary to the bank.
He spent 80% of the remaining amount.
And he is left with Rs. 3500
To find,
His total earning.
Solution,
Let,the total earning = Rs. x
[Assume, x as a variable to do the further mathematical calculations.]
Deposited amount = x × 12.5/100 = Rs. x/8
Remaining amount = x - x/8 = Rs. 7x/8
Now,the left amount is (100%-80%) = 20% of the remaining amount
Left amount = 7x/8 × 20/100 = Rs. 7x/40
Now, if we compare the two values of the left amount then we will get the following mathematical equation,
7x/40 = 3500
x = 3500 × 40/7
x = 20000
Hence,his monthly salary is Rs. 20000.
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