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Final answer:The fraction 20/70 simplifies to its lowest terms as 2/7 after dividing both the numerator and the denominator by their greatest common divisor, which is 10.Explanation:To simplify the fraction 20/70 to its lowest terms, we need to find the greatest common divisor (GCD) that both the numerator and the denominator share. Both 20 and 70 are divisible by 10, which is their GCD. Dividing the numerator and denominator by 10, we get:20 ÷ 10 = 270 ÷ 10 = 7Thus, the fraction 20/70 simplified to its lowest terms is 2/7, which corresponds to option A....