Yes.
84 is a 50% increase of 56. 153 is a 50% increase of 102. The proportion has therefore remained the same. The two fractions are thus equal.
Yes, they are equivalent.
306 over 56 in lowest terms is 153 over 28.
28/51
No.
7
14 over 22 is equal to 56 over 88.
63
3/4
The sum of 13/56 and 5/7 is 53/56
you need to equal them out, so it is actually 48 over 56 (times by 8) subtract 7 over 56 (times by 7). so the answer is 41 over 56.
They you are the proud owner of a block of metal with a volume of 56 cubic centimetres and a mass of 153 grams. Enjoy!
24/56 and 18/42 both equal 3/7 in their simplest forms.