Then by the science and technology group: x = 9: 10,
Science and technology team = 910x;
According to composition group: Math group = 5: 7,
Math group =75x,
9 10x+75x=69,
(9+ 14)x=690,
x=30,
75×30-30=25×30= 12 (person);
Answer: There are more people in the math group than in the composition group 12.