67.4% is the change from 319 to 534
Calculation steps:
[( 534 - 319 ) ÷ 319] x 100 = 67.4%
Formula
Percentage change = [(534 - 319) / 319] x 100
Subtract the new number by the original number
534 - 319 = 215
215 ÷ 319 = 0.6739811912225705
0.6739811912225705 x 100 = 67.4%