Answer:
1: 25% increase. 2: 25% decrease. 3: 200% increase.
Step-by-step explanation:
For number 1, we see that the difference between 12 and 15 is 3. 3 happens to be 25% of 12, so that is our answer. For number 2, the difference is 6, which is also 25%, except this one is decreasing, so a 25% decrease. For number 3, the difference between 9 and 27 is 18, and 18 is 200% of 9.
