-83.79% is the change from 623 to 101
Calculation steps:
[( 101 - 623 ) ÷ 623] x 100 = -83.79%
Formula
Percentage change = [(101 - 623) / 623] x 100
Subtract the new number by the original number
101 - 623 = -522
-522 ÷ 623 = -0.8378812199036918
-0.8378812199036918 x 100 = -83.79%