No. If there are larger common factors, use them instead. It will be much quicker. The most efficient is to use the highest common factor (HCF).
For example, to simplify 70/100
you could use the prime factors 2 and 5 to do
70/100 = 35/50 = 7/10
or
you could simply go for 10, as a common factor so that 70/100 = 7/10.
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what is the ratio or prime numbers to composite numbers in this list/10,11,2,13,14,15,16,1,7,18,19,20,21
2:3
Prime numbers are: 2 3 5 7 Composite numbers are: 4 6 8 9 10 So the ratio is: 4 to 5
The numbers, when converted to integers are co-prime. So there is no simplification. The ratio is 1683 : 1978 : 2273.
4/4 = 1