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First, we take 70 x 2 =140 and then 7x2 =14. Add 140 to 14 to give 154 as the answer.
Take out 2 and get 7/28, take out 7 and get 1/4
To write 14 over 28 in its lowest terms, you need to find the greatest common divisor (GCD) of 14 and 28, which is 14. Dividing both the numerator and denominator by 14 yields 1/2. Therefore, 14 over 28 in its lowest terms is 1 over 2.
Compute the LCM by factoring both and finding the GCF, multiply the numbers together and divide by the GCF. Factors of 14 are [2 7] Factors of 20 are [2 2 5] GCF is 2, so take 14*20=280 and divide by 2, so the answer is 140 ◄ Another way is to take the highest power of all common factors, so it would be 2^2 * 5 * 7 = 140◄
To add two fractions with different denominators, you first need to find a common denominator. In this case, the least common multiple of 7 and 14 is 14. So, you need to rewrite 2/7 as an equivalent fraction with a denominator of 14, which is 4/14. Then, you can add 4/14 + 5/14 to get 9/14 as the sum.