The ratio of girls to boys in the middle school = 213 : 193
Number of fifth-grade boys = 100
Number of fifth grade girls = 110
There are 7 fewer sixth-grade boys than fifth-grade boys
Number of sixth-grade boys = 100 - 7
Number of sixth-grade boys = 93
There are 10 more sixth-grade girls than sixth-grade boys
Number of sixth-grade girls = 93 + 10
Number of sixth-grade girls = 103
Total number of girls = Number of sixth-grade girls + Number of fifth-grade girls
Total number of girls = `103 + 110
Total number of girls = 213
Total number of boys = Number of sixth-grade boys + Number of fifth-grade boys
Total number of boys = `93 + 100
Total number of boys = 193
The ratio of girls to boys in the middle school = 213 : 193
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