-67.4% is the change from 635 to 207
Calculation steps:
[( 207 - 635 ) ÷ 635] x 100 = -67.4%
Formula
Percentage change = [(207 - 635) / 635] x 100
Subtract the new number by the original number
207 - 635 = -428
-428 ÷ 635 = -0.6740157480314961
-0.6740157480314961 x 100 = -67.4%