Tag: math mom cooks

  • Fractions Aren't Exact!

    Fractions Aren't Exact!

    I make Texas shaped waffles every Saturday morning. But this weekend I ran into a snag. The recipe called for 2 cups of Bisquick and I only had 1 1/4 cups left!

    Break out the fractions!

    “This shouldn’t be a problem,” I thought. “I’m good with fractions. I’ll just scale down the whole recipe.”

    2 cups is the same as 8 quarter cups. I have 1 1/4 cups of Bisquick — or five quarter cups.

    So I need to break the other ingredients down into eight pieces and only use five of them.

    This is the thinking that most math people would translate into, “I need 5/8 of the whole recipe.”

    Sounds good!

    Until I saw the other ingredients…

    • 1 1/3 cups milk
    • 1 egg
    • 2 tablespoons oil

    For real?!

    Here’s how I thought about the fractions in the 1 1/3 cups milk:

    Since I need 5 of the eight pieces, I need 5 of the 1/6 cups. Grief!

    “Don’t panic,” I thought, “4 of the 1/6 cups give me 2/3. And 5/6 is pretty close to 1. So let’s just estimate the milk as almost a cup.”

    Now what about the egg?

    I was not about to find 5/8 of an egg. So I thought:

    The recipe doesn’t say a large egg or a medium egg. And the variations of eggs are huge. So what would it matter if I used one egg or 5/8 of an egg? It’s still pretty close.

    I dumped the whole egg in.

    And I threw caution to the wind.

    At this point, my fractions were so far gone I just tipped the bottle of oil up and let it go.

    And wouldn’t you know — we had some pretty awesome waffles!

    Share your thoughts in the comments or on twitter/x.

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