Answer:
Fraction of book read by \[\frac{180}{200}\] [\[\frac{9}{10}\] HCF of 25 and 100 = 25] Fraction of book read by Lalita \[\to \] For comparing \[\frac{9\times 2}{10\times 2}=\frac{18}{20}\] and \[\frac{9\times 3}{10\times 3}=\frac{27}{30}\] We have, \[\frac{660}{990}\] and \[=\times 2\times \times 5\times \] [by cross-product] \[990=\times 3\times \times 5\times \] \[990=2\times 3\times 5\times 11=330\] Hence, IIa reads less pages of a book.
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