-37.38% is the change from 634 to 397
Calculation steps:
[( 397 - 634 ) ÷ 634] x 100 = -37.38%
Formula
Percentage change = [(397 - 634) / 634] x 100
Subtract the new number by the original number
397 - 634 = -237
-237 ÷ 634 = -0.37381703470031546
-0.37381703470031546 x 100 = -37.38%