Question 11
A store sells T-shirts, shirts and jackets. The price of a jacket is equal to the sum of the prices of a T-shirt and a shirt. If the price of a shirt were increased by 80%, its new price would be equal to the sum of the prices of a T-shirt and a jacket. By what percentage would the price of a T-shirt need to increase to equal the sum of the prices of a shirt and a jacket?