If the denominator of a rational number is 7, then in decimal form it would be written as a repeating decimal with a repeating cycle of 6 digits. This is because 7 is a prime number and the repeating cycle of any repeating decimal with a prime denominator is always equal to one less than the denominator. Therefore, the repeating cycle of B would be 6 digits long.
If the denominator of a rational number is 7, the repeating cycle of the decimal representation will have at most 6 digits. This is because the repeating cycle of a decimal representation depends on the prime factors of the denominator. In this case, 7 is a prime number, so the repeating cycle can have up to 6 digits.
