Well first of all we know that 8.21 as a fraction is 821 ------ 100 but thats not as a mixed number in order to change it to a mixed number we need to see how many time we can fit 100 into 821 in this case it only fits 8 times so thats our whole number but 21 is left over! we put it as our numerator and keep 100 the same as our denominator. heres what it looks like now 21 8 -------- 100 merry christmas:)