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12.5 is 25% of what number ?

Answer
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Hint: In the given question, we are required to calculate the number whose 25% corresponds to a specific number given to us in the problem. We must remember the formula for finding a specific percentage of a number as: Percentage=PartWhole×100%. Percentage of a number corresponds to the share or share in the whole thing.

Complete step by step answer:
In this specific question, we are required to find the number whose 25% corresponds to 12.5.
So, we find that specific number by using the formula for percentage as Percentage=PartWhole×100%.
Let us assume the total number to be x.
So, the whole corresponds to the number x and the part corresponds to the number 12.5 in this case. Also, the percentage is given to us as 25%. So, we substitute these known values in the above mentioned formula. So, we get,
25%=12.5x×100%
Now, we have to find the value of x in the above equation.
We use the method of transposition to shift the terms in the equation and find the value of the variable. Shifting the variable to the left side of equation and constants to the right side of the equation, we get,
x=12.525%×100%
Simplifying the calculations, we get,
x=125025
Simplifying the calculations by cancelling common factors in numerator and denominator, we get,
x=50
So, the value of x is 50.
Hence, 12.5 is 25% of 50.

Note:
The percentage formula Percentage=PartWhole×100% can be used to find any parameter in the equation given the other parameters. In these questions we should focus on what these words mean. Percentage is unitless quantity. When we find percent of two quantities then both should have the same unit.
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