-81.63% is the change from 245 to 45
Calculation steps:
[( 45 - 245 ) ÷ 245] x 100 = -81.63%
Formula
Percentage change = [(45 - 245) / 245] x 100
Subtract the new number by the original number
45 - 245 = -200
-200 ÷ 245 = -0.8163265306122449
-0.8163265306122449 x 100 = -81.63%