Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
 Karatasi mpya ina kurasa 120. Sammy anatumia 25% ya kurasa kwa mradi wake wa sayansi, na kurasa nyingine 10 kwa kazi yake ya hesabu. Kurasa ngapi zimesalia kwenye karatasi?


### Response:
 Alitumia 120 * 0.25 = <<120*0.25=30>>30 kwa sayansi.
Kulikuwa na kurasa 120 - 30 = <<120-30=90>>90 zilizosalia.
Kisha alikuwa na kurasa 90 - 10 = <<90-10=80>>80 zilizosalia.