-47.3% is the change from 666 to 351
Calculation steps:
[( 351 - 666 ) ÷ 666] x 100 = -47.3%
Formula
Percentage change = [(351 - 666) / 666] x 100
Subtract the new number by the original number
351 - 666 = -315
-315 ÷ 666 = -0.47297297297297297
-0.47297297297297297 x 100 = -47.3%