The numbers in that last panel are Miki's bust, waist and hip measurements, of course. The ones on the left are her measurements in her original incarnation (as a 14-year-old), and the ones on the right are her new measurements after the franchise's transition into "2nd VISION" with the release of THE iDOLM@STER 2 (as a 15-year-old).
Seven-thirty?How much sleep do you need...They say that children who sleep will grow, but...Master Miki-Miki's asleep again→Mhmm~And when'd you get up this morning?Mnah.What time do you go to bed?Nnn... Eleven?