-67.3% is the change from 951 to 311
Calculation steps:
[( 311 - 951 ) ÷ 951] x 100 = -67.3%
Formula
Percentage change = [(311 - 951) / 951] x 100
Subtract the new number by the original number
311 - 951 = -640
-640 ÷ 951 = -0.6729758149316509
-0.6729758149316509 x 100 = -67.3%