Good evening,
Answer: approximatively 49,3 / 49 inches tall (read below).
Explanation:
Well to calculate a percentage out of number you multiply the number by the percentage and divide the product by 100.
12x56=672 ; 672:100=6,72
If you want to round to the tenths digit, you will get the following result: 6,72 ≈ 6,7 ; 56-6,7= 49,3 inches.
If you want to round to the units digit, you will get the following result: 6,72 ≈ 7 ; 56-7= 49 inches.
*Note: It is correct and actually simpler to write 12x56/100=6,72. I just detailed the operation here.