Second question
①Adele has ⅓ more jelly beans than Emily.
⅓ is 1 out of 3.
So we can say that Emily has 3 units of jelly beans and Adele has 1 unit more than her. Adele has 4 units.
Ratio of sweets of Adele to Emily = 4 : 3

②Emily has 3/5 less jelly beans than Nora.
3/5 is 3 out of 5.
So we can say that Nora has 5 units of jelly beans and Emily has 3 units less than her. Emily has 2 units.
Ratio of jelly beans of Emily to Nora = 2 : 5

Now we have a repeated identity, Emily. We should make her units the same number for both ratios, since it's for the same person.
The common multiple of 2 and 3 is 6.
We can change 4 : 3 into 8 : 6
We can change 2 : 5 into 6 : 15
Ratio of jelly beans of Adele to Emily = 8 : 6
Ratio of jelly beans of Emily to Nora = 6 : 15
Now we can write the ratio comparing all three girls.

Ratio of jelly beans of Adele to Emily to Nora = 8 : 6 : 15
Total number of units = 8+6+15 = 29
So 29 units = 58 jelly beans
1 unit = 58 jelly beans ÷ 29 = 2 jelly beans

Number of jelly beans Nora has = 15 units
= 15 x 2
= 30