a) If Toby and Ollie share some money in the ratio 5:2, this means that for every 5 parts Toby gets, Ollie gets 2 parts.
The total number of parts is 5+2 = 7.
Ollie's share is 2 out of 7 parts of the money.
Therefore, Ollie gets 2/7 of the money.
b) If Harri gets 1/5 of the sweets, this means that for every 1 part Harri gets, Ellis gets 4 parts, since:
1 + 4 = 5
The total number of parts is 5.
Therefore, the ratio of the number of sweets Ellis gets to the number of sweets Harri gets is:
4:1 or 4/1