Question

Jack spends 15% of his pocket money sweets and 35% of magazines. he saves the rest

Answer 1

Rest amount = 100% - 35% - 15%
= 100 - 50 = 50%

In short, Your Answer would be 50%

Hope this helps!

Answer 2

15+35=50. 100-50=50.

He has 50% of his pocket money left.