279.8% is the change from 99 to 376
Calculation steps:
[( 376 - 99 ) ÷ 99] x 100 = 279.8%
Formula
Percentage change = [(376 - 99) / 99] x 100
Subtract the new number by the original number
376 - 99 = 277
277 ÷ 99 = 2.797979797979798
2.797979797979798 x 100 = 279.8%