Question

verify closure property of subtraction of rational number 2/3 and 4/5​

Answer 1

If a/b and c/d are any two rational number then

(a/b)-(c/d)

example:2/3 - 4/5

LCM=15

2/3×5= 10/15

4/5×3= 12/15

10/15-12/15=-2/15