The simplest form of 21/75 is 7/25
75/2 is in its simplest form.
15 to 4
2/5
7/25
7/75
4.5:0.75 = 450:75 = 6:1
5/6 or 5 to 6 as a ratio.
HCF(15, 75) = 15.Therefore 15/75 = 1/5.
HCF(75, 100) = 25.Therefore, 75/100 = 3/4.
75/112 is already in simplest form.
112/300 reduces to 56/150 when both terms are halved. Halving again gives 28/75. This is the simplest form. Expressed as a ratio, 28:75.