The sum of the numerator and denominator of a fraction is 43. If 17 is added to the denominator, the fraction can be reduced to 13, which is______ ．

The sum of the numerator and denominator of a fraction is 43. If 17 is added to the denominator, the fraction can be reduced to 13, which is______ ．

43 + 17 = 60, total number of shares: 1 + 3 = 4 (shares), numerator: 60 × 14 = 15, current denominator: 60 × 34 = 45, original denominator: 45-17 = 28, then the original score is 1528

If you add 1 to the numerator of a fraction, the fraction is 1. If you add 1 to the denominator of the fraction, the fraction is 78. What is the original fraction?

78 = 1416, 16-1 = 15. So the original score is 1415. A: the original score is 1415

For a fraction, the numerator is 21 times larger than the denominator, and then it is one and three fifths. What is the original fraction?

One and three fifths = eight fifths
The difference is 8-5 = 3
The difference is 21, so it's about 7
So the original score was 56 out of 35

The numerator of a fraction is 16 smaller than the denominator, and it will get three fifths after about a fraction. What is the original number

(a-16)/a=3/5
a=40
The score is 24 / 40
Molecule: 16 △ (5-3) × 3 = 24
Denominator: 16 ÷ (5-3) × 5 = 40
Score: 24 / 40