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Verified Answer :

thea5

make the denominators equal by multiplying both the numerator and denominator of 1/4 by 3 so you haveĀ 
8 5/12+ 11 3/12= 19 8/12

8 5/12 + 11 1/4 = (812+5)/12 + (114+1)/4 = 101/12 + 45/4 = 101/12 + 453/43 = 101/12 + 135/12 = (101+135)/12 = 236/12 = 59/3 = 19 2/3