Mary spent 100/4= <<100/4=25>>25 dollars on a new video game.

So, after the video game purchase, Mary was left with 100 - 25 = <<100-25=75>>75 dollars.

Mary then bought swimming goggles for 75/5 = <<75/5=15>>15 dollars

Mary had 75 - 15 = <<75-15=60>>60 dollars left

# Answer

60
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
On Mary's birthday, her brother surprised her with $100. She spent a quarter of it on a new video game and then used a fifth of what was left on swimming goggles. How much money did she have left?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
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user
60
On Mary's birthday, her brother surprised her with $100. She spent a quarter of it on a new video game and then used a fifth of what was left on swimming goggles. How much money did she have left?
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