Ratios, rates, proportional relationships, and units SAT question

The correct answer is $1,015$. It’s given that the first moon orbits the planet every $252$ days. Therefore, it takes the first moon $252(29)$, or $7,308$, days to orbit the planet $29$ times. It’s also given that the second moon orbits the planet every $287$ days. Therefore, it takes the second moon $287(29)$, or $8,323$, days to orbit the planet $29$ times. Since it takes the first moon $7,308$ days and the second moon $8,323$ days, it takes the second moon $8,323-7,308$, or $1,015$, more days than it takes the first moon to orbit the planet $29$ times.