Answers

2014-11-11T22:51:35+08:00
Find the lcd first. do it this way. >>432(LCD)÷18 x 19 = 456 >>432÷24 x 15 = 270 >>> 456-270/432 = 186/432 (divide the numerator and denaminator to 6) .... therfore the answer is 31/72
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2014-11-13T13:47:06+08:00
19/18+(-15/24)   first you apply the function of multiplication by the sign
19/18-15/24 =76-45/72  second you find the lcd or the less common denominator
                      31/72  third subtract it then you get the answer.
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