SAT Question 273b7f37: Percentages answer and explanation with Desmos solution

Choice B is correct. The number of harvested potatoes Isabel saved to plant next year can be calculated by multiplying the total number of potatoes Isabel harvested, $760$, by the proportion of potatoes she saved. Since she saved $10\%$ of the potatoes she harvested, the proportion of potatoes she saved is $\frac{10}{100}$, or $0.1$. Multiplying $760$ by this proportion gives $760\left(0.1\right)$, or $76$, potatoes that she saved to plant next year.