102.89% is the change from 311 to 631
Calculation steps:
[( 631 - 311 ) ÷ 311] x 100 = 102.89%
Formula
Percentage change = [(631 - 311) / 311] x 100
Subtract the new number by the original number
631 - 311 = 320
320 ÷ 311 = 1.0289389067524115
1.0289389067524115 x 100 = 102.89%