Respuesta :

the answer is 0.5833
11/15 - 3/20
= 11/(3*5) - 3/(4*5)
= (11*4)/(3*4*5) - (3*3)/(3*4*5)
= (44 - 9)/(3*4*5)
= 35/(3*4*5)
= (7*5)/(3*4*5)
=7/12

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