Answer:
19) 10 2/3 21) 34 6/11 23) 27 5/9
Explanation:
1) first turn them both into improper fractions
so first step is to look at the denominator and × it by the big number next to it, then add on the top number (numerator) to it
e.g. 9 x 2, you then get 18 then do 18+2 =20,
now this gives you the numerator of your improper fraction, you then keep the denominator (9) the same so it will become 20/9 (hence why they are called top heavy/improper fractions)
2) do the same for the second fraction,
so 5 x 4 =20, 20+4 = 24, then put in the denominator, so it's 24/5
3) now with multiplying you don't need to find the lowest common multiple you just multiply straight across:
do 20 × 24 for the numerator then 9 × 5 for the bottom
20/9 × 24/5= 480/45
this is your answer but you need to simplify it and leave it as a mixed number
5) so work out how many times 45 fully goes into 480 = 10 times (10×45=450 so there is a remainder of 30)
so 10 will be ur big number and 30 ( the remainder will go at the top and the bottom will still be 45
6) so you will get 10 30/45, but as you still need to further simplify 30/45 (divide by 15 to get 2/3), so the final answer would be 10 and 2/3 (10 2/3)