= (1/102+1/202) + (1/103+1/201) + ... + (1/151+1/153) + 1/152 / 2/102.202 + ... + 2/151.153 + 2/152.152
= 304/102.202 + 304/103.201 + ... + 304/151.153 + 152/152.152 / 2/102.202 + ... + 2/151.153 + 2/152.152
= 152 (2/102.202 + 2/103.201 + ... + 2/151.153 + 1/152.152) / 2 (1/102.202 + 1/103.201 + ... + 1/152.152)
= 152 / 2
= 76