4/6+1/3-1/100=.......

4/6 + 1/3  - 1/100=
=400/600  +  200/600 -  6/600=
= 594/600= 99/100

или
1) 4/6 + 1/3 = 4/6 +2/6 = 6/6 =1
2) 1 - 1 /100 = 99/100