SOLUTION: Find the sum or difference. 9/20 - -3/16 Thanks sooooo much! Please work really fast! Happy Holidays!

Question 64992This question is from textbook Pre-Algebra
: Find the sum or difference. 9/20 - -3/16

Thanks sooooo much! Please work really fast! Happy Holidays! This question is from textbook Pre-Algebra

Found 2 solutions by stanbon, Shin123:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the sum or difference. 9/20 - -3/16
Least common denominator (lcd) is 80
Rewrite each fraction with the lcd as its denominator.
[9*4/lcd]+[3*5/lcd]
Add the numerators and write that over the lcd
[36+15]/lcd
=51/80
Cheers,
Stan H.
Answer by Shin123(626) (Show Source): You can put this solution on YOUR website!

LCD of 20 and 16 is 80.
51/80!
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