If I get a scholarship of seventy to eighty percent, will it reduce my fees significantly in Germany?

Yes, a scholarship covering 70 - 80% will significantly reduce your tuition fees in Germany.

For example, if your tuition fee is €1,500 per semester, an 80% scholarship would bring it down to €300 per semester. At private universities with higher fees, this kind of scholarship still reduces most of your tuition costs.

You will still need to pay for semester contributions, living expenses, health insurance, and other fees. Overall, a 70 - 80% scholarship makes studying much more affordable.