4/7 = 8/14 by multiplying the numerator and denominator by 2
0.8375 = 8375/10000 is an equivalent fraction. No additional working is required. The given fraction can be simplified but the question only asked for an equivalent fraction not a fraction in its simplest form.
2% as a fraction is 1/50 !
0.3 is the decimal expression for three tenths, which as a fraction is 3/10. 3/10 is an equivalent fraction to 30/100. 30/100 when expressed as a percentage is 30%.
Won’t work
-12.02 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its equivalent, in rational form, is -1202/100. You can simplify this rational fraction if you so wish.
You cannot add or subtract fractions with different denominators. If the denominators are different then you need to work with equivalent fractions.
0.0118
0.0385
39.5 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. And, being a decimal, there is no simpler form. Its rational equivalent is 395/10 which can be simplified to 79/2, in my view a clumsier fraction to work with!.
10/14, 15/21, any of these will work, just multiply the top and bottom # by the same number. Like 5/7 * 4/4 = 20/28 for example. Multiply by a fraction equivalent to 1
7.050 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its rational equivalent is 7050/1000 which can be simplified to 141/20. Not only does simplification mean that you lose information about the precision of the fraction, you also end up with a clumsier fraction to work with.
The lowest is 11/21 - I'm sure you can work the rest out yourself !