What is 2 thirds plus 5 sevenths?

Answer 1

2/3 + 5/7 (the common denominator is 21, the LCM of 3 and 7)

= 2*7/3*7 + 5*3/7*3

= 14/21 + 15/21

= (14 + 15)/21

= 29/21

= (21 + 8)/21

= 21/21 + 8/21

= 1 + 8/21

= 1 8/21