Conversion factors: soup calls for 4.0lbs of onions,. 1 onion has mass of 115g. How many onions are needed?

Question

anonymous · Answer

The conversion rate for pounds to grams is 1 pound = 453.59237 grams

Therefore, to solve for the number of onions required you would first convert your pounds to grams: $$4.0 \times 453.59237$$ = 1814.36948 g

You would then divide the mass of onions required (1814.36948 g) by the mass of a single onion (115g) to determine the number of onions required for the recipe. $$1814.36948g \div 115g$$
= 15.777 onions

As you can't have .777 of an onion, you need 16 onions for the soup.

anonymous · Answer

Thanks! I had the answer but couldn't figure out how they came up with the answer!