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

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Answer 1 · 2016-11-12T14:00:37

#41/60#

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)#

= #16/60+25/60= 41/60#

If you cannot spot the lowest common denominator then.

So #4/15 +5/12 = (4/15 xx 12/12) + (5/12 xx 15/15)#

= #48/180+75/180=123/180#

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