Final answer:
The second number is greater than the first number by 25% and the first number is less than the second number by 20%.
Step-by-step explanation:
To determine the percent by which the second number is greater than the first, we can use the formula:
Percent increase = (Increase / First number) * 100
Using this formula, we have:
Percent increase = ((25 - 20) / 20) * 100
= 25%
Similarly, to determine the percent by which the first number is less than the second, we can use the formula:
Percent decrease = (Decrease / Second number) * 100
Using this formula, we have:
Percent decrease = ((20 - 25) / 25) * 100
= -20%