Answer:
2/7
Step-by-step explanation:
28 + 500 = 528, so just make 4 expressions with the answer of 528 for each
1. 21 + 507
2. 1 + 527
3. (4 x 7) + 500
4. 530 - 2
There are a whole lot more ways, so you can change these if you want. (It's really super simple.) Hope this helped
Answer:
incomplete question
Step-by-step explanation: