The decimal 1.0227 is a rational number. First of all, it is a terminating decimal, which means that the decimal has a definite ending point. All terminal decimals are rational numbers. In addition, the decimal 1.0227 can be converted to a fraction of 10,227/10,000. Since both 10,227 and 10,000 are integers (whole numbers), this also tells us that it is a rational number.