mohon di bantu ya teman :) no 6

p = 7/3
q = 5/2
r = 5/4
p-q:r=7/3-5/2:5/4
=7/3-(5/2:5/4)
=7/3-(5/2×4/5)
=7/3-20/10
=70/30-60/30
=10/30
=1/3 (c)