0.6 =6/ 10=3/5
0.45 =45/ 100=9/20
0.37 =37/ 100
0.75 =75/ 100=3/4
1.5 =3/2
3.25 = 13/4
Second, the number of scientific and technological works in three classes of grade five in Xingguang Primary School: 36 in class one, 24 in class two and 30 in class three.
(1) What percentage of the total number of first-class scientific and technological works? What about Class Two and Class Three? (Numbers are expressed by the simplest fraction)
Total: 36+24+30=90 (pieces)
1 grade: 36÷90=36/90=2/5
Category II: 24÷90=24/90=4/ 15.
Category III: 30÷90=30/90= 1/3.
(2) According to the given data, put forward a problem expressed by score.
The answer is not unique.
What is the total of the works of Class One and Class Two?