To convert a fraction to a percent, divide the numerator by the denominator, this should give you a decimal. To change it from decimal to a percent, multiply the decimal by 100.
1. 4/5 = 0.8 = 0.8*100 = 80%
2. 11/25 = 0.44 = 0.44*100 = 44%
3. 4/50 = 0.08 = 0.08*100 = 8%