Prime factors of 210 = 2 x 3 x 5 x 7
Prime factors of 147 = 3 x 7 x 7
Common factors = 3 x 7 so the highest common factor is 21.
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The GCF is 6.
Seven is the highest prime factor. The prime factors for 210 are: 2 x 3 x 5 x 7
147 / 2.10 = 70Therefore, 147 is 210 percent of 70.
To find the number, you can divide 147 by 2.1, which equals approximately 70.
The least common factor of 30 and 42 is the smallest number that is a factor of both of them and is 1.However, I suspect that you mean either:What is the highest common factor of 30 and 42?ie what is the highest number that is a factor of both 30 and 42: hcf = 6;What is the lowest common multiple of 30 and 42?ie that is the smallest number that is a multiple of both 30 and 42 lcm = 210.