19 over 50 - 20 over 70 = ?
What is the LCM between 50 & 70? Because if I use 50 & 70 as my denominators I will have to do lots of simplifying afterward, how can I find the LCM???
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it is 19/50 - 20/70 so take the lcm of 50 and 70 as 350
[(19×7)-(20×5)]/350 = (133-100)/350 = 33/350
[(19×7)-(20×5)]/350 = (133-100)/350 = 33/350
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