-52.15% is the change from 512 to 245
Calculation steps:
[( 245 - 512 ) ÷ 512] x 100 = -52.15%
Formula
Percentage change = [(245 - 512) / 512] x 100
Subtract the new number by the original number
245 - 512 = -267
-267 ÷ 512 = -0.521484375
-0.521484375 x 100 = -52.15%