Jack's spending: (per week)

Sweets: 15%

Magazines: 35%

Total spendings =15% + 35% = 50%

Savings = 100%-50% = 50%

i.e., Every week, Jack spends 15% on sweets, 35% on Magazines and remaining 50%, goes into savings.

So, if the weekly pocket of Jack is $100, he spends $15 on sweets, $35 on Magazines and saves the rest $50.

Hope this helps.