Jake started with an initial amount of 1 kg of olives or 1000 grams.
He made 9 loaves of olive bread and each bread requires 30 grams of olive, therefore total amount of olives used is:
9 * 30 grams = 270 grams
Therefore Jakes is left with:
1000 grams – 270 grams = 730 grams
Answer:
730 grams