Dragons of Tarkir has variants:
Explore this pack in Sealed.

Sheets

Sheet basic

At rate 1/15 (6.67%)

Sheet common (color balanced)

At rate 1/101 (0.99%)

Sheet uncommon

At rate 1/80 (1.25%)

Sheet rare_mythic

At rate 2/121 (1.65%)
At rate 1/121 (0.83%)

Sheet foil

At rate 3/580 (0.52%)
At rate 1/320 (0.31%)
At rate 3/1210 (0.25%)
At rate 3/2420 (0.12%)