Question

find the sum -9/10+22/15​

Answer 1

Take the LCM of the denominators of the given rational numbers.

LCM of 10 and 15 is 30

Express each of the given rational numbers with the above LCM as the common denominator.

Now,

(-9/10)= [(-9×3)/ (10×3)] = (-27/30)

(22/15)= [(22×2)/ (15×2)] = (44/30) Then,

= (-27/30) + (44/30) ... [∵denominator is same in both the rational numbers] = (-27 + 44)/30

= (17/30)