Question

if 1/3 of a no. exceed its 2/7 by1 . find the no.

Answer 1

Let the number be a

According to question

a/3 - 2a/7 = 1

=> (7a - 6a) /21 = 1

=> a = 21

Required number = 21

Answer 2

Let the no be a

according to question

a/3-2a/7=1

=(7a-6a)/21=1

therefore
[a=21]

required no is 21