How do you evaluate #\frac { 3} { 8}+ \frac { 1} { 7}#?

1 Answer
sankarankalyanam
Jun 29, 2018

#color(purple)(=> (21 + 8) / 56 = 29 / 56#

Explanation:

#3 / 8 + 1 / 7#

There is no common factor for 8 and 7.

Hence L C M of 8 & 7 is #8 * 7 = 56#

#=> ((3 * 7) / (8 * 7)) + ((1 * 8) / (7 * 8))#

#=> 21 / 56 + 8 / 56#

#color(purple)(=> (21 + 8) / 56 = 29 / 56#

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