<human>:  Elsa gets 500 MB of cell phone data each month. If she spends 300 MB watching Youtube and 2/5 of what's left on Facebook, how many MB of data does she have left?
<bot>: How many MB of data does Elsa have left? ** First subtract the 300 MB Elsa spent on YouTube: 500 MB - 300 MB = <<500-300=200>>200 MB.
How many MB of data does Elsa have left? ** Then multiply 200 MB by 2/5th to find out how much data Elsa spent on Facebook: 200 MB * 2/5 = <<200*2/5=80>>80 MB.
How many MB of data does Elsa have left? ** Finally, subtract the data Elsa spent on Facebook from the 200 MB: 200 MB - 80 MB = <<200-80=120>>120 MB.
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