-95.47% is the change from 662 to 30
Calculation steps:
[( 30 - 662 ) ÷ 662] x 100 = -95.47%
Formula
Percentage change = [(30 - 662) / 662] x 100
Subtract the new number by the original number
30 - 662 = -632
-632 ÷ 662 = -0.9546827794561934
-0.9546827794561934 x 100 = -95.47%