having trouble with these 2 problems & the process.

-50 3/4 +(-6.05)+ 100=

and

23 7/8 - 15 3/40 +(-3 4/5)=

help please!!!!

-50 3/4 = -203/4 = - 5075/100

-6.05 = -605/100

100 = 10,000/100

so
(-5075 -605 + 10,000)/100

= 4320 / 100

= 43.2