Let'sconsider ratio of 5 paise to 25 paise is same as the ratio of 20 paise to x paise.
Then, 5 paise25 paise=20 paisex
⇒ 525=20x
⇒ 5×x=25×20⇒ x=25×205⇒ x=100
Hence, the ratio of 5 paise to 25 paise is the same as the ratio of 20 paise to 100 paise.