Joyce paid 143.00 for an item at the store that was 35 percent off the original price. What was the original price?

Let x be the original price.

The item is 35/100 * x = 0.35x cheaper.
So the price Joyce paid was x - 0.35x = 0.65x.
Joyce paid 0.65x = 143.
x = 143 / 0.65 = <<143/0.65=220>>220. Answer: \boxed{220}.