possible BUG when simplifying expressions with units

[compsystems]

Hello

There is a possible BUG when simplifying expressions with units

74_deg + 42_mn*(1_deg/60_mn) + 15_s *(1_deg/3600_s); [Enter] 74.7041666667_deg

but

60_min/1_deg = 1_deg/1_deg [Enter] (60_(mn*deg^-1)) = (1_(deg*deg^-1))
expected 60_mn/1_°= 1

https://www.wolframalpha.com/input?i=60+...eg%2F1+deg

[compsystems]

a similar case

(60_mn = 1_deg)/(1_deg) [Enter] (60_(mn*deg^-1)) = (1_(deg*deg^-1))

simplify(60_(mn*deg^-1) =1_(deg*deg^-1)) [Enter] (60_(mn/deg)) = (1_1)

[parisse]

_mn is a time unit.
_deg is not a real unit (angle unit do not have a physical dimension), it's just 2*pi/360.
You can check that with mksa(...)

[JMB]

In HOME the units for angular dimensions are:

• Degree: _deg
• Minute: _arcmin
• Second: _arcs
  

USIMPLIFY(60_arcmin/1_deg) gives the correct answer: 1