2/29/2020 
Look at Me, I'm R&D applies to all numbers that appear on the card, including numbers in mana symbols, rules text, power, toughness, collector number, and art. 
2/29/2020 
You can choose a number with a fraction. 
2/29/2020 
Note that you are changing numbers, not numerals within a number. Choosing 2 and 3 won't change 20 to 30 or ½ to ⅓. 
2/29/2020 
If you choose 0 for the first number, you are allowed to choose 1 for the second. The same is true for ½ and ½. 
