The price of a gallon of gasoline increased from 2.50 a gallon to 2.75 a gallon what was the percent increase

When you answer this can you explain

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).

Savannah had 40 iris blooms last year this year she had 15% more iris blooms how many more hours blooms did savannah have this year