Round off the following numbers to 2 dectmal places: \( \begin{array}{ll}\text { a) } 672,6470087 & \text { b) } 943,738095\end{array} \)

For the first number, 672.6470087, when rounding to two decimal places, we look at the third decimal place, which is a 7. Since 7 is greater than 5, we round up the second decimal place from 4 to 5. Therefore, the rounded number is 672.65. For the second number, 943.738095, the third decimal place is an 8. Since 8 is greater than 5, we round up the second decimal from 3 to 4. Thus, the rounded number is 943.74.