-87.76% is the change from 245 to 30
Calculation steps:
[( 30 - 245 ) ÷ 245] x 100 = -87.76%
Formula
Percentage change = [(30 - 245) / 245] x 100
Subtract the new number by the original number
30 - 245 = -215
-215 ÷ 245 = -0.8775510204081632
-0.8775510204081632 x 100 = -87.76%