Answer:
14
Step-by-step explanation:
This is a division problem.
990 kg / 69 kg = 14.3
14 × 69 kg = 966 kg
15 × 69 kg = 1035 kg
14 crates weigh 966 kg which is less than 990 kg.
15 crates weigh 1035 kg which is greater than 990 kg.
The greatest number of crates with a combined weight less than 990 kg is 14.
Answer: 14