4: You have created an Emerald ring that cost you $35 to make but you are selling it for $120. What would be the percent markup for this item?
35 *x = 120-35
x = 2.428= 242.8 % mark up
$120 / $35 = 3.4285714 - 1 x 100 =242.86% markup.
Check: $35 x [1 + 242.86/100] =
$35 x 3.4286 =~$120 - Sale price.
+36916 
