How to lose weight fast?

So I'm soon turnng 18 and I realy want to lose at least two kg.
Current weight and height
172 cm - 5.7
47 kg - 104 pounds - 103 lbs

I dont have that much time to work out. I have long school days and tend to have long shifts at work.
Updates
+1 y
TURNING * Sorry!
How to lose weight fast?
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