If the yoga mat cost $8.50 and it is marked up by 75%, we can see how much it cost now by multiplying 8.50 by 75% (75% is the same as 0.75)
8.50 x 0.75 = 6.38
Now we can add 6.38 to 8.50 to get our final answer.
8.50 + 6.38 = 14.88
The yoga mat now cost $14.88.