Fix issue #110.

src/logarithm.jl

@@ -195,6 +195,7 @@ Base. *(x::Gain, y::Quantity) = *(y,x)
 # Division
 Base. /(x::Level, y::Number) = (leveltype(x))(linear(x) / y)
 Base. /(x::Level, y::Quantity) = linear(x) / y
+Base. /(x::Quantity, y::Level) = x / linear(y)
 Base. /(x::Level, y::Level) = linear(x) / linear(y)
 Base. /(x::Level{L,S}, y::Gain{L}) where {L,S} = Level{L,S}(fromlog(L, S, ustrip(x) - y.val))
 Base. //(x::Level, y::Number) = (leveltype(x))(linear(x) // y)

src/quantities.jl

@@ -57,9 +57,11 @@ end
 //(x::Units, y::Number) = (1//y) * x
 
 /(x::Quantity, y::Quantity) = Quantity(/(x.val, y.val), unit(x) / unit(y))
+/(x::Quantity, y::Number) = Quantity(/(x.val, y), unit(x) / unit(y))
+/(x::Number, y::Quantity) = Quantity(/(x, y.val), unit(x) / unit(y))
 //(x::Quantity, y::Quantity) = Quantity(//(x.val, y.val), unit(x) / unit(y))
-//(x::Quantity, y::Number) = Quantity(//(x.val, y), unit(x))
-//(x::Number, y::Quantity) = Quantity(//(x, y.val), inv(unit(y)))
+//(x::Quantity, y::Number) = Quantity(//(x.val, y), unit(x) // unit(y))
+//(x::Number, y::Quantity) = Quantity(//(x, y.val), unit(x) / unit(y))
 
 # ambiguity resolution
 //(x::Quantity, y::Complex) = Quantity(//(x.val, y), unit(x))

test/runtests.jl

@@ -428,6 +428,8 @@ end
         @test @inferred(false*1kg) === 0kg                # Boolean multiplication (F)
     end
     @testset "> Division" begin
+        @test 360° / 2 === 180.0°            # Issue 110
+        @test 360° // 2 === 180°//1
         @test 2m // 5s == (2//5)*(m/s)       # Units propagate through rationals
         @test (2//3)*m // 5 == (2//15)*m     # Quantity // Real
         @test 5.0m // s === 5.0m/s           # Quantity // Unit. Just pass units through
@@ -529,7 +531,7 @@ end
         @test !isapprox(1.0u"m", 1.1u"m"; atol=50u"mm")
         @test isapprox(1.0u"m", 1.1u"m"; rtol=0.2)
         @test !isapprox(1.0u"m", 1.1u"m"; rtol=0.05)
-        
+
         # Test eps
         @test eps(1.0u"s") == eps(1.0)u"s"
         @test eps(typeof(1.0u"s")) == eps(Float64)u"s"