To solve this problem, let's determine the final amount left after the subtraction and considering the waste.

1. Initial amount: 454 grams
2. Subtracted amount: 441 grams
3. Waste amount: 1.3 grams

First, subtract the subtracted amount from the initial amount:

$454 \, \text{grams} - 441 \, \text{grams} = 13 \, \text{grams}$

Then, consider the waste amount. Since 1.3 grams is waste, we subtract this from the remaining amount:

$13 \, \text{grams} - 1.3 \, \text{grams} = 11.7 \, \text{grams}$

So, the final number after all subtractions and accounting for waste is 11.7 grams.

Would you like more details or have any questions?

Here are 5 related questions that expand on this information:

1. What would be the remaining amount if the waste increased to 2 grams?
2. If the initial amount was 500 grams, how much would be left after subtracting 441 grams and accounting for 1.3 grams of waste?
3. How would the calculations change if the waste was in a different unit, like milligrams?
4. If the waste was a percentage of the initial amount, how would you calculate it?
5. What is the formula for finding the final amount after multiple subtractions and considering waste?

Tip: When solving problems involving different quantities and waste, always double-check your units to ensure consistency and accuracy.