-84.09% is the change from 635 to 101
Calculation steps:
[( 101 - 635 ) ÷ 635] x 100 = -84.09%
Formula
Percentage change = [(101 - 635) / 635] x 100
Subtract the new number by the original number
101 - 635 = -534
-534 ÷ 635 = -0.8409448818897638
-0.8409448818897638 x 100 = -84.09%