Step-by-step explanation:
[tex] \frac{65}{100} \times x = 780 \\ \\ \therefore \: x = 780 \times \frac{100}{65} \\ \\ \therefore \: x = 60 \times \frac{100}{5} \\ \\ \therefore \: x = 60 \times 20 \\ \\ \therefore \: x = 1200 \\ [/tex]
Hence, 65 over 100 of 1200 is 780.