Question

If a=7,b=9,c=80,d=34 then d/c+a/b=?

Answer 1

d/c + a/b = 34/80 + 7/9
= 17/40 + 7/9
= (17×9 + 7×40) / (40×9)
= (153 + 280) / 360
= 433 / 360