How do you solve \frac { 4} { 15} + \frac { 5} { 12}415+512?

1 Answer
Nov 12, 2016

41/604160

Explanation:

The lowest common denominator is 60.
60 is the lowest number both 15 and 12 will go into

So 4/15 +5/12 = (4/15 xx 4/4) + (5/12 xx 5/5)415+512=(415×44)+(512×55)

= 16/60+25/60= 41/601660+2560=4160

If you cannot spot the lowest common denominator then.

So 4/15 +5/12 = (4/15 xx 12/12) + (5/12 xx 15/15)415+512=(415×1212)+(512×1515)

= 48/180+75/180=123/18048180+75180=123180

Cancel/ divide numerator and denominator by 3 to give answer.