rufus and christable share 120 tadpoles in the ratio 3:5.How many tadpoles the easy recive

do u mean how many do they each receive??

it is simple..
there are 8 parts so divide 120 by 8 to get one part then work it out

divide by 120. That gives you ONE part. Now, to get Rufus' share, multiply by three. To get Chrisable's share, multiply the one part by five.