Answer:
HCF: 15 / LCM: 225
Explanation:
The factors of 45 are: 1, 3, 5, 9, 15, 45
The factors of 75 are: 1, 3, 5, 15, 25 75.
The highest factor they share in common is 15 (HCF).
Multiples of 45: 45, 90, 135, 180, 225
Multiples of 75: 75, 150, 225, 300, 375
The lowest multiple they share in common is 225 (LCM).