find the
national no between between 3/5and 2/7
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FORMULA IS 3N/2 + NO OF DIGITS
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let LCM of 2/5 and 3/7 is 35, then, 2/5 * 7/7 and 3/7 * 5/5 = 14/35 and 15/35 now to get 3 rational number between 2/5 (14/35) and 3/5 (15/35) arewe have to multiply 4 (3+1) to the numerator and denominator then, 14/35 * 4/4 and 15/35 * 4/4 = 56/140 and 60/140 hence the 3 rational numbers between 2/5 (56/140) and 3/5 (60/140) are 57/140 , 58/140 , 59/140
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