Step-by-step explanation: TO turn a mixed number into an improper fraction, the best way is to multiply the denominator of the fraction by the whole number, then add the product to the numerator, then use that as the numerator of your new improper fraction, keeping the denominator the same.
U have to multiply 2 times 9 and you’ll get 18, but then you have to add 18 and 21 and you’ll get 39, but you keep 9 as the denominator. So your answer would be 39/9.
