Answer:
23/63
Explanation:
To simplify the expression 8/63 - (-5/21), we can follow these steps:
Step 1: Simplify the double negative by changing the sign of the second fraction.
8/63 + 5/21
Step 2: Find a common denominator for the fractions, which in this case is 63.
To convert the second fraction, multiply the numerator and denominator by 3.
8/63 + (5 * 3)/(21 * 3)
=8/63 + 15/63
Step 3: Combine the fractions with the common denominator.
(8 + 15)/63
=23/63
Therefore, the simplified expression is 23/63.