Question

$\frac{ - 12}{20} + \frac{15}{21} = ?$
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Answer 1

Answer:

L.c.m -  420

-12/20 x 21/21 = -252/420 + 15/21 x 20/20 = 300/420

-252/420 + 300/420

48/420

4/5 - ANS

Answer 2

Answer is 0.114

Step-by-step explanation:

$- \frac{12}{20} + \frac{15}{21} \\ \\ = \frac{ - 12 \times 21 + 15 \times 20}{420} \\ \\ = \frac{ - 252 + 300}{420} \\ \\ = \frac{48}{420} \\ \\ = 0.114$