-34.85% is the change from 637 to 415
Calculation steps:
[( 415 - 637 ) ÷ 637] x 100 = -34.85%
Formula
Percentage change = [(415 - 637) / 637] x 100
Subtract the new number by the original number
415 - 637 = -222
-222 ÷ 637 = -0.34850863422291994
-0.34850863422291994 x 100 = -34.85%