Question

2 /3 ( 8/4 - 21/ 7 )÷ ( 15/5 - 10/ 2 )= *
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Answer 1

2 /3 ( 8/4 - 21/ 7 )÷ ( 15/5 - 10/ 2 )= 2/3(8/4−21/7)15/5−10/2

2/3(2−21/7)15/5−10/2

2/3(2−3)15/5−10/2

2/3(−1)15/5−10/2

−2/3/15/5−10/2−2/3/3−10/2

−2/ 3/3−5

−2/3−2

=1/3

Respuesta: 1/3