Question

If the first number is 20% less than the second number and the second number is 25%

more than 100, then find the first number.​

Answer 1

Answer:

the first no. is 100

Step-by-step explanation:

100+25%=125

125-20%=100

Answer 2

Answer:  The required first number is 100.

Step-by-step explanation:  Given that the first number is 20% less than the second number and the second number is 25%  more than 100.

We are to find the first number.

Let the first number and second number be represented by x and y respectively.

Then, according to the given information, we have

$y=100+25\%\times100=100+\dfrac{25}{100}\times100=100+25=125$

and

$x=y-20\%\times y=125-\dfrac{20}{100}\times125=125-\dfrac{1}{5}\times125=125-25=100.$

Thus, the required first number is 100.