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.
Given that,
The second number is 25% more than 100.
The first number is 20% less than the second number.
Now,
The second number is
= 100 + 25% of 100
= 100 + 25
= 125
Similarly,
The second number is
= 125 - 20% of 125
= 125 - 25
= 100
Hence, the first number is 100.