-83.71% is the change from 620 to 101
Calculation steps:
[( 101 - 620 ) ÷ 620] x 100 = -83.71%
Formula
Percentage change = [(101 - 620) / 620] x 100
Subtract the new number by the original number
101 - 620 = -519
-519 ÷ 620 = -0.8370967741935483
-0.8370967741935483 x 100 = -83.71%