Final answer:
Raisins constitute approximately 17% of Sal's granola when rounding to the nearest whole number, based on the ratio 20:5:4 of oats, raisins, and almonds.
Step-by-step explanation:
To determine what percent of Sal's granola is made up of raisins, we must look at the ratio of oats to raisins to almonds, which is given as 20:5:4. The total parts can be calculated by adding these numbers together. The total number of parts is 20 (oats) + 5 (raisins) + 4 (almonds) = 29 parts in total. To find the percentage of the granola that is raisins, we take the part of the raisins and divide it by the total number of parts:
Percentage of raisins = (raisins / total parts) x 100 = (5 / 29) x 100
Calculating this gives us:
(5 / 29) x 100 ≈ 17.24%
Therefore, rounding to the nearest whole number, raisins make up approximately 17% of Sal's granola.