1. Simplify : {(7) 1/2 X (8) 1/2 X (21) 4/5 } / {(28) 1/2 X (9) 3/4 }

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1. Simplify : {(7) 1/2 X (8) 1/2 X (21) 4/5 } / {(28) 1/2 X (9) 3/4 }

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Answer:I don’t know i am only asking