101.9% is the change from 158 to 319
Calculation steps:
[( 319 - 158 ) ÷ 158] x 100 = 101.9%
Formula
Percentage change = [(319 - 158) / 158] x 100
Subtract the new number by the original number
319 - 158 = 161
161 ÷ 158 = 1.018987341772152
1.018987341772152 x 100 = 101.9%