A 12 ounce bottle of clean green dish soap is $1.09 with a 20 ounce bottle cost $1.99 which is the better bye
In order to compare both deals, we need to calculate unit prices
1st deal = 1.09 / 12 = 0.91
2nd deal = 1.99/20 = 0.0995
Here, 0.91 > 0.0995
So, 2nd deal is cheaper hence, it is better buy
Hope this helps!