(1) Rohit obtained 45 marks out of 80. What per cent marks did he get? (2) 45% of the students in a school are boys. Iftotal number of students in the school is 880, find number of girls in school?

(1) Rohit obtained 45 marks out of 80. What per cent marks did he get?

1.	(1) Rohit obtained 45 marks out of 80. What per cent marks did he get? (2) 45% of the students in a school are boys. Iftotal number of students in the school is 880, find number of girls in school?
Answer» (1)GIVEN marks obtained by Rohit = 45Given total marks = 80To find the percentage, we have to multiply the quantity by whole quantity with 100⇒ Percentage of marks Rohit got = 45 x 100/80⇒ 45 x 10 / 8⇒ 450 / 8⇒ 56.25 %∴ Percentage of marks obtained by Rohit = 56.25%(2)Given percentage of boys in a school = 45%Given total no.of students in the school = 880No.of girls = ?If 45% of the total students in the school are boys, then, 55% of the total students in the school are girls for SURE ( 100% - 45% = 55%)⇒ 55% of 880 total students are girls⇒ 55% x 880⇒ 55 x 880 / 100⇒ 55 x 88 / 10⇒ 4840 / 10⇒ 484∴ There are 484 NUMBER of girls in the schoolThnx and have a nice day!✌