You need at least two numbers to find a GCF.
27
It is: 27
27
The GCF is 27.
Reducing the fraction 9/27 is finding the highest common factor (HCF) of 9 and 27 and dividing both of them by the HCF.
It is: 9
It is 9
3
3
It is: 1
27 and 108 respectively
hcf(16×27×49, 8×2725) = 8×27 = 216 Using prime factorisation: 16×27×49 = 2⁴ × 3³ × 7² 8×27×125 = 2³ × 3³ × 5³ → hcf = 2³ × 3³ = 8×27 = 216