Nonequivalent fractions are not equal to each other. To determine if two fractions are nonequivalent, you must also cross multiply. For example, to determine if 1/3 and 2/5 are equivalent, you must multiply 1 times 5, which equals 5, and 3 times 2, which equals 6.
It's an arithmetic progression with first term = 8 and common difference d =2:
so the next term is 14 + 2 = 16
You divide it the inequalties and multiply the equations to get you answer