Abicycle store pays $29.62 for a helmet the store sells the helmet for $39.99 find the percent markup

Percent increase = (new number - original number) / original number...* 100
                           = (39.99 - 29.62) / 29.62* 100
                           = 10.37 / 29.62* 100
                           = 0.35 * 100
                           = 35% markup <===

Need the graph to answer this.