1. Subtract the first rational number from the second rational number
b) -4 /21 and 5/ 14
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You have to make the denominator equal and do cross multiplication
Adamyasingh:
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5/14 - (-4/21)
LCM of 14 and 21 is 42
5/14×3/3=15/42
4/21×2/2=8/42
15-8/42=7/42=6
and is 6
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