To solve this problem, we need to find the difference between the correct amount of flour (3 3/10 cups) and the amount that John actually put in (3 5/8 cups).
First, let's convert 3 3/10 to an improper fraction:
3 3/10 = (3 * 10 + 3)/10 = 33/10.
Next, let's convert 3 5/8 to an improper fraction:
3 5/8 = (3 * 8 + 5)/8 = 29/8.
Now, let's find the difference between the two fractions:
33/10 - 29/8.
To subtract fractions, we need to find a common denominator. In this case, the common denominator is 10 * 8 = 80.
Therefore, the equation becomes:
(33/10) * (8/8) - (29/8) * (10/10) = 264/80 - 290/80.
Now, let's subtract the two fractions:
264/80 - 290/80 = (264 - 290)/80 = -26/80.
Finally, let's simplify the fraction as much as possible:
-26/80 = -13/40.
So, John put in an extra 13/40 cups of flour.
John is cooking cupcakes. The recipe calls for 3 3/10 cups of flour. He accidentally put in 3 5/8 cups. How many extra cups did he put in?
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