-46.48% is the change from 512 to 274
Calculation steps:
[( 274 - 512 ) ÷ 512] x 100 = -46.48%
Formula
Percentage change = [(274 - 512) / 512] x 100
Subtract the new number by the original number
274 - 512 = -238
-238 ÷ 512 = -0.46484375
-0.46484375 x 100 = -46.48%