80 grams is equivalent to 160% of 50 grams. 50 grams is less than 80 grams

You don't know how to sing,
（80－50）÷80＝37.5%

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1. What percentage of 25g is 20g? What percentage is 20g less than 25g?
2. One third more than 30 kg is () kg, and one third more than 30 kg is () kg
3. () kg is one third more than 150 kg, two fifths less than 45 kg () kg
4. A quarter more than 12 kg is () kg; a quarter more than 12 kg is (); a third more than 12 kg is () kg
5. 100 g is 1 / 2 more than 50 G The number of female students is 1 / 6 less than that of male students, that is, the number of male students is 1 / 6 more than that of female students? Apples weigh 3 / 4 kg more than oranges, which means oranges are 3 / 4 kg lighter than apples A piece of iron wire is 2 meters long, cut off 3 / 5 meters, and find the remaining meter sequence as () [fill in the blank] In the tree planting activity, 95 trees were planned to be planted, and 2 / 19 more trees were actually planted The machine tool factory plans to produce 4900 machine tools in August. In fact, it has completed 4 / 7 of the tasks in the second half of the month, and the second half of the month is the same as the first half. How many machines are actually overproduced A pile of coal, the first time transported 1 / 4 of this pile of coal, which is exactly 15 tons, the second time transported 1 / 3 of this pile of coal, how much was transported
6. 50 grams is more than 40 grams
7. 1: () kg is 30% more than 100 kg. 2:20 kg is 10% lighter than () kg. 3:50 G is 40% less than () g. 4: () m is 50% longer than 5 m
8. () 10% more than 10m and () 40% less than 15m
9. Eighty kilograms is a quarter more than several thousand grams
10. =+A kilogram is a quarter more than a kilogram
11. 5 after reducing its ()% to 3, () is 10% less than 60%, and 30g is ()% less than 80g
12. What percentage is 8 grams more than 5 grams?
13. One sixth of the circumference is () of the right angle, and twice of the horizontal angle is () degree
14. One fourth of a circumference is () degree, and five sixth of a horizontal angle is () degree
15. What is the degree of 1 / 4 of a horizontal angle? What is the degree of 1 / 4 of a perimeter angle? What is the degree of 1 / 2 of a right angle? What is the angle
16. The obtuse angle among the following angles is () a.1/6 circumference b.3/5 horizontal angle c.4/3 horizontal angle d.9/10 right angle
17. What is an obtuse angle? Are perimeter and horizontal angles also obtuse angles?
18. Two () angles are equal to a circumference. Four () angles are equal to a circumference. Two () angles are equal to a flat angle. Arrange acute angles and circumference from small to large
19. The horizontal angle is equal to []; the perimeter angle is equal to []; 1 ° = [] ', 1' = [] '; 1' = [] '; 1' = [] '
20. A circumference is equal to several flat angles, which is several times of a right angle