Question

Add the following rational numbers. a) -5/7 + 2/21 b) 2/9 + 5/16

Answer 1

Answer:

a) LCM of 7 & 21 is 21

so. -15/21 + 2/21 = -13/21

b) LCM of 9 and 16 is 144

so 32/144 + 45/144 =77/144