The correct spelling is forty. The word ‘ fourty ‘ is a common misspelling and is not recognized as correct in English. For example, when talking about age, you should say, “She is forty years old,” not “She is fourty years old. This mistake is easy to make because other numbers, like ‘ fourteen ‘ and ‘four’, start with ‘four-. Learn the difference between "forty" and " fourty ." Discover correct usage, spelling tips, and examples to enhance your English vocabulary today! Discover the correct way to spell forty vs. fourty and clear up common confusion for effective communication in English. The concept of 40 in words is essential in mathematics and helps in solving real-world and exam-level problems efficiently. Knowing the correct way to write number names, especially for common numbers like 40 , is important for spelling , cheques, and exams. Let’s explore how to write 40 in words, rules for spelling , and real-life uses.