No, King Henry did not invent fractions. The use of fractions predates him by many centuries. Fractions were used by ancient civilizations such as the Egyptians, Babylonians, and Greeks long before Henry’s time.
However, if you’re referring to King Henry VIII of England, there is no connection between him and the invention of fractions.
It’s possible you’re thinking of Henry of Hesse, a German mathematician in the 16th century, who was involved in early mathematical work, but again, he did not invent fractions. The development of fractions is more closely tied to ancient mathematics and evolved over time through the contributions of various cultures and mathematicians.