107.4% is the change from 311 to 645
Calculation steps:
[( 645 - 311 ) ÷ 311] x 100 = 107.4%
Formula
Percentage change = [(645 - 311) / 311] x 100
Subtract the new number by the original number
645 - 311 = 334
334 ÷ 311 = 1.0739549839228295
1.0739549839228295 x 100 = 107.4%