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(7. 9 %\ of\ 134)-(3. 4 %\ of\ 79)=? 7....

`(7. 9 %\ of\ 134)-(3. 4 %\ of\ 79)=?` `7. 3` b. `8. 1` c. `8. 6` d. `7. 8` e. none of these

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