Подскажите как пожалуйста

c) = 39/143 - 11/143 = 28/143

d) = 21/60 + 40/60 = 61/60 = 1 1/60

e) = 15/102 + 82/102 = 97/102

f) = 62/90 - 21/90 = 41/90

g) = 15/36 + 32/36 = 47/36 = 1 11/36

h) = 35/112 - 32/112 = 3/112