Each situation below gives an original amount followed by a new amount. Which illustrates the greatest percent of increase?

Answer:
2) 12 gallons: 15 gallons = 25% increase
Step-by-step explanation:
1) 23 pencils more
23/230 = 10% increase
2) 3 gallons more
3/12 = 25% increase
3) 3 miles more
3/18 = 16.7% increase
4) $9 less
9/12 = 75% decrease