Suppose r is a real number for which
\left\lfloor r+\frac{19}{100}\right\rfloor+\left\lfloor r+\frac{20}{100}\right\rfloor+\left\lfloor r+\frac{21}{100}\right\rfloor+\cdots+\left\lfloor r+\frac{91}{100}\right\rfloor=546
Find \lfloor 100 r\rfloor. (For real x,\lfloor x\rfloor is the greatest integer less than or equal to x.)