A worksheet for one and a half servings
Calculate a 1.5-serving portion, distinguish it from one serving plus half the package, and check the result by addition.
One and a half servings means 1.5 times the quantity described by the serving heading. It does not mean one item plus half the package. That distinction matters when a packet contains multiple bars, biscuits, or portions.
Serving information is the starting point described in the FDA serving-size guide. This worked worksheet uses invented snack-bar values to show a fractional portion without suggesting how much anyone should eat.
Define the fraction before using it
Imagine that the package says one bar weighs 36 g and contains 5 g protein, 18 g total carbohydrate, and 90 mg sodium. A whole bar plus 18 g of another bar is a 54 g portion. The ratio 54 ÷ 36 is 1.5, so every nutrient amount uses that same multiplier.
| Nutrient | One serving | Multiply by | Portion estimate |
|---|---|---|---|
| Protein | 5 g | 1.5 | 7.5 g |
| Total carbohydrate | 18 g | 1.5 | 27 g |
| Sodium | 90 mg | 1.5 | 135 mg |
Check the multiplication another way
Split the portion into a whole serving and a half serving. For protein, 5 + 2.5 equals 7.5 g. For sodium, 90 + 45 equals 135 mg. This second route is useful when entering formulas into a spreadsheet: both routes should reach the same answer.
A common mistake is to type 1.05 instead of 1.5. Another is to add 0.5 directly to the nutrient amount. Neither represents half an additional serving. Keep the multiplier in its own cell and attach “servings” to its heading.
Check whether the extra half is representative
A homogeneous bar cut into two equal weights is easier to estimate than a snack with a separate coating, filling, or topping. If the piece you leave behind has a visibly different composition, simple proportional scaling remains an assumption rather than a measured nutrient result.
For a real package, retain its serving statement and the portion measurement alongside the calculation. If one and a half bars weigh 57 g rather than 54 g, decide whether your task uses counted bars or measured mass and record that choice consistently. Do not switch between the two bases halfway through the worksheet.