249.3% is the change from 71 to 248
Calculation steps:
[( 248 - 71 ) ÷ 71] x 100 = 249.3%
Formula
Percentage change = [(248 - 71) / 71] x 100
Subtract the new number by the original number
248 - 71 = 177
177 ÷ 71 = 2.492957746478873
2.492957746478873 x 100 = 249.3%