133.8% is the change from 287 to 671
Calculation steps:
[( 671 - 287 ) ÷ 287] x 100 = 133.8%
Formula
Percentage change = [(671 - 287) / 287] x 100
Subtract the new number by the original number
671 - 287 = 384
384 ÷ 287 = 1.3379790940766552
1.3379790940766552 x 100 = 133.8%