3.38% is the change from 532 to 550
Calculation steps:
[( 550 - 532 ) ÷ 532] x 100 = 3.38%
Formula
Percentage change = [(550 - 532) / 532] x 100
Subtract the new number by the original number
550 - 532 = 18
18 ÷ 532 = 0.03383458646616541
0.03383458646616541 x 100 = 3.38%