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On a school trip the ratio of the number of teachers to students is 1:15.
\n" ); document.write( " The ratio of male students to female students is 7:5.
\n" ); document.write( "Work out what percentage of people on the trip are female.
\n" ); document.write( " Give your answer correct to the nearest whole number.
\n" ); document.write( " I've tried multiplying by 5 but I just don't get ratios.
\n" ); document.write( ":
\n" ); document.write( "you have to know the male to female teachers ratio also
\n" ); document.write( "Let's assume the male to female teachers was 3:5, that means we have a minimum of 8 teachers
\n" ); document.write( "The teacher student ratio is given as 1:15, therefore we have 15 * 8 = 120 students
\n" ); document.write( "The total people, students and teachers = 128
\n" ); document.write( "We know we have 5 female teachers. Find how many female students
\n" ); document.write( "let x = the multiplier, then
\n" ); document.write( "7x = number of male students
\n" ); document.write( "5x = number of female students
\n" ); document.write( "7x + 5x = 120
\n" ); document.write( "12x = 120
\n" ); document.write( "x = 120/12
\n" ); document.write( "x = 10
\n" ); document.write( "therefore the number of female students 10*5 = 50 female students
\n" ); document.write( "Total female teachers and female students 5 + 50 = 55
\n" ); document.write( "Find the percentage females (55) to total in the group (128)
\n" ); document.write( "55/128 * 100 = 43% females in the group \n" ); document.write( "