3/4 x 3/5
lcm of 15 and 20
0.5 ÷ 0.2
express as a single fraction 2+x÷5 - 1÷4
(x-4)x(600/x-5)
x=ky/r^2
-2 3/4 x 1 3/5
lcm of 60 and 100
3x^2/2
4/a + 5/b