Percent yield is calculated as

Percent yield is calculated as

• A. (actual yield / theoretical yield) × 100
• B. (theoretical yield / actual yield) × 100
• C. (actual yield + theoretical yield) × 100
• D. (theoretical yield - actual yield) × 100

Answer: (A)

Percent yield shows how efficient a reaction was by comparing what you actually obtained to what was theoretically possible. The correct formula is percent yield = (actual yield / theoretical yield) × 100. Actual yield is the amount of product you really collected from the experiment, while theoretical yield is the maximum amount that could form based on stoichiometry if everything went perfectly. The ratio tells you what fraction of the possible product you achieved, and multiplying by 100 converts that fraction into a percentage. For example, if you isolated 4.5 g of product but the theoretical yield was 5.0 g, the percent yield would be (4.5 / 5.0) × 100 = 90%. The other forms don’t measure efficiency: placing theoretical yield over actual yield would give a value often greater than 100% and doesn’t reflect actual performance, while adding or subtracting the yields has no direct meaning for how efficiently the reaction produced product.

Percent yield shows how efficient a reaction was by comparing what you actually obtained to what was theoretically possible. The correct formula is percent yield = (actual yield / theoretical yield) × 100.

Actual yield is the amount of product you really collected from the experiment, while theoretical yield is the maximum amount that could form based on stoichiometry if everything went perfectly. The ratio tells you what fraction of the possible product you achieved, and multiplying by 100 converts that fraction into a percentage.

For example, if you isolated 4.5 g of product but the theoretical yield was 5.0 g, the percent yield would be (4.5 / 5.0) × 100 = 90%.

The other forms don’t measure efficiency: placing theoretical yield over actual yield would give a value often greater than 100% and doesn’t reflect actual performance, while adding or subtracting the yields has no direct meaning for how efficiently the reaction produced product.