Answer:
To determine which answer is bigger, let's calculate the values after the given changes and compare them.
Increasing 28 by 25%:
To calculate the increase, we need to find 25% of 28 and add it to 28.
25% of 28 = (25/100) * 28 = 7
Increased value = 28 + 7 = 35
Decreasing 40 by 15%:
To calculate the decrease, we need to find 15% of 40 and subtract it from 40.
15% of 40 = (15/100) * 40 = 6
Decreased value = 40 - 6 = 34
Comparing the results:
The increased value of 28 by 25% is 35, while the decreased value of 40 by 15% is 34.
Therefore, 35 is bigger than 34.