2) \( \frac{210}{30}-\frac{40}{8}= \)

To solve this expression, first simplify each fraction. \( \frac{210}{30} = 7 \) and \( \frac{40}{8} = 5 \). Now the expression becomes \( 7 - 5 \), which equals \( 2 \). Now, let's talk about the fun side of fractions! Did you know that fractions date back over 4,000 years to ancient Mesopotamia? They were used by the Babylonians, who employed a base-60 number system, making some of their fraction calculations delightfully complex! And for all math enthusiasts out there, a common mistake is to forget the order of operations! Remember: when dealing with a mix of operations, work from multiplication and division to addition and subtraction to avoid any calculation hiccups!