For eacg of the following , perform the given operations. Make sure to Reduce.

a) 19/20 -5/8 + -7/10

b)24/40 ÷ (30/14)(25/63)

c) (-24/25)(-25/-26)(-26/27)(-27/-28)(-28/29)(-29/-30)

a. 19/20 - 5/8 - 7/10 = 38/40 - 25/40 -

28/40 = -15/40 = -3/8.

b. (24/40)/(30/14)(25/63) =
(3/8)/(15/7)(25/63) = (7/8)/(375/441) =
7/8 * 441/375 = 3087/3000 = 1029/1000

c. (-24/1)(1/1)(-1/1)(1/1)(-1/1)(1/30)
= -24/30 = -4/5.