78.64% is the change from 309 to 552
Calculation steps:
[( 552 - 309 ) ÷ 309] x 100 = 78.64%
Formula
Percentage change = [(552 - 309) / 309] x 100
Subtract the new number by the original number
552 - 309 = 243
243 ÷ 309 = 0.7864077669902912
0.7864077669902912 x 100 = 78.64%