Final answer:
Ja'miya has saved 75% of her $84 goal, which is calculated by dividing $63 by $84 and then multiplying by 100. Therefore, the most appropriate option is C.
Step-by-step explanation:
To calculate the percentage of money Ja'miya has already saved towards her $84 goal, you would use the formula for percentage: (part / whole) × 100. In this case, the part is the amount she has saved, which is $63, and the whole is the total amount she hopes to save, which is $84. So you calculate (63 / 84) × 100, which simplifies to (0.75) × 100, giving you 75%. Therefore, Ja'miya has saved 75% of her goal.