45.45% is the change from 55 to 80
Calculation steps:
[( 80 - 55 ) ÷ 55] x 100 = 45.45%
Formula
Percentage change = [(80 - 55) / 55] x 100
Subtract the new number by the original number
80 - 55 = 25
25 ÷ 55 = 0.45454545454545453
0.45454545454545453 x 100 = 45.45%