I'm trying to figure out what is the meaning of the percentage value (comparing to 24-hours before?) and the small last digit?
The percent change refers to the current price versus the price 24 hours ago.
For the first one (USDTRY), the quote is 5.7082 and is up 0.1639 or 2.96%. Because they are rounding the percent gain to 2 decimals, there's a small error introduced. The actual gain is 2.9562%.
To determine yesterday's price:
5.7082 / (1+.029562) = 5.5443
Today's gain is 5.7082 - 5.5443 or 0.1639 (up 2.9562 %) or 2.96% when rounded.
I don't know what the small last digit notation represents.