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Question
Evaluate:
`5/21 - (-13)/42`
Sum
Solution
| 2 | 21, 42 |
| 3 | 21, 21 |
| 7 | 7, 7 |
| 1, 1 |
LCM of 21, 42 = 2 x 3 x 7 = 42
`= (5xx2)/(21xx2) - (-13xx1)/(42xx1)`
LCM of 21 and 42 = 42)
`= (10+13)/42 = 23/42`
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