Madeleine had a total of 200 dollar ==> 100% = $200

After shopping, she had 80 dollar left.

We need to know the amount decreased .

First we need to know the amount she spent.

==> 200 -80 = 120

Then, she spent a total of 120 dollar

Then the...

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Madeleine had a total of 200 dollar ==> 100% = $200

After shopping, she had 80 dollar left.

We need to know the amount decreased .

First we need to know the amount she spent.

==> 200 -80 = 120

Then, she spent a total of 120 dollar

Then the spending money decreased by 120 dollar

Now we need to calculate the amount as a percent .

We know that :

100% = 200

x % = 120

==> x = 120*100 /200 = 60

==> She spent 60% of her spending money.

**Then her spending money decreased by 60% and she had 40% left.**