Explanation:
0.40 = 40%
450 is the final.
Let's not talk about money for once.
40% of x is 450.
40% of the total cake is 450.
Answer:
Jake attended his friend Mark's birthday party. Mark only invited Jake. They had a red velvet cake to eat. Jake ate 450g of cake, which is 40% of the whole cake. How many grams was the original cake?