Question

28/45:63/40 ; 8/15:24 ; 8:4/5 ; 1: 7/19 ;

Answer 1

28/45 : 63/40=4/9*8/9=32/81
8/15:24=1/15:1/3=1/45
8:4/5=2*5=10
1:7/19= 19/7

Answer 2

It seems you have provided a series of mathematical expressions or ratios. I'll break down each of them for you:

1. 28/45 : 63/40 This expression represents the ratio of 28/45 to 63/40. To simplify the expression, you can find a common denominator for both fractions. In this case, the common denominator would be 180. So, the simplified ratio would be: (28/45) : (63/40) = (28/45) * (40/40) : (63/40) * (45/45) = (1120/180) : (2835/180) = 1120 : 2835

2. 8/15 : 24 Similarly, this expression represents the ratio of 8/15 to 24. To simplify, you can multiply the numerator and denominator of the fraction by the same number to get an equivalent ratio: (8/15) : 24 = (8/15) * (1/1) : (24/1) = (8/15) : (24/1) = 8 : 360

3. 8 : 4/5 This expression represents the ratio of 8 to 4/5. To simplify, you can convert the fraction to a whole number by multiplying the numerator by the reciprocal of the denominator: 8 : (4/5) = 8 : (4 * (1/5)) = 8 : (4/5) = 8 : (4 * 5/1) = 8 : 20

4. 1 : 7/19 This expression represents the ratio of 1 to 7/19. To simplify, you can follow the same approach as the previous example: 1 : (7/19) = 1 : (7 * (1/19)) = 1 : (7/19) = 1 : (7 * 19/1) = 1 : 133

So, the simplified ratios are:

1. 1120 : 2835
2. 8 : 360
3. 8 : 20
4. 1 : 133