Answer:
Olive will save $420 each month.
Explanation:
This question can be solved using a rule of three.
Olive earns $2,800 a month. $2,800 is 100% = 1 of her earnings. She wants to save x, which is 15% = 0.15 of her income. How much is x?
2800 - 1
x - 0.15x
x = 2800*0.15 = $420
Olive will save $420 each month.