a new car cost €5000, its price was reduced twice by the same percentage, now the car costs €38,720, the price of the car was reduced by several percent each time?

Let x be the percentage: 38720=50000(1-2x) $$ 1-2x=\frac{38720}{50000} $$ -2x=0.7744-1 -2x=-0.2256 x=11.28%