Answer:
The train pulled by teeth is 1.45 metric tons heavier or 1 9/20 metric tons heavier than the train pulled with a beard.
Explanation:
Least Common Denominator (LCD): 20
2 3/4 metric tons = 2 15/20 = 2.75 metric tons
4 1/5 metric tons = 4 4/20 = 4.2 metric tons
FRACTION:
4 4/20 = 84/20
2 15/20 = 55/20
DECIMAL:
4.20-2.75 = 1.45 metric tons
Difference In Weight: (84-55)/20 = 29/20 = 1 9/20 = 1.45 metric tons
4.2/2.75 = 52.727273% heavier
HOPE THIS HELPS!!!