plz help me

1. Find (a) 10% of 200 (b) 50% of E5 (c) 20% of E8 (d) 25% of $100 (e) 40% of $500 (f) 90% of 200 (@) 33% off12 (h) 75% of 800 (1) 75% of 1000 (j) 80% of 20 kg (k) 70% of 5 kg (1) 30% of 50 kg (m) 5% of 100 m (n) 20% of 50 m (0) 25% of $30