Subtract:

(i) -5/6 from -7/8 

(ii) 2 1/5 from -3 1/6

(i) (-7/8) − (-5/6) = (-7/8) + (5/6)

= (-7 × 3)/(8 × 3) + (5 × 4)/(6 × 4) [LCM of 8 and 6 = 24]

= (-21/24) + (20/24) = (-21 + 20)/24 = -1/24

(ii) 2¹/₅ from -3¹/₆ = -3¹/₆ − 2¹/₅

= (-19/6) − (11/5)

= (-19 × 5)/(6 × 5) − (11 × 6)/(5 × 6) [LCM of 6 and 5 = 30]

= (-95/30) − (66/30) = (-95 − 66)/30 = -161/30 = -5¹¹/₃₀