Answer: -21/7 or -3 (depends on your instruction)
Explanation:
Opposite: the opposite of the current sign
- if it is currently negative [-], then its opposite is positive [+]
- If it is currently positive [+], then its opposite is negative [-]
Reciprocal: changing the place of numerator and denominator
- The reciprocal of a/b is b/a
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7/21
Opposite: since it is positive, the opposite is negative
Reciprocal: since it is 7/21, we change the place, and it is 21/7=3
Opposite reciprocal of 7/21 is -21/7 or -3
