Eighteen minus negative nine is twenty-seven
18-(-9)=27
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4/-9 − 5/2 = -53/18 or -217/18
9
4/9 = 24/54 1/6 = 9/54 24/54 - 9/54 = 15/54 = 5/18
The difference between 6%, 9%, and 12% Hydrogen Peroxide solution is the Hydrogen content.
To write equal ratios multiply both terms by the same number or divided both terms. For example, 2/ 9 is a ratio equal ratio will be 4/18. There is no difference between equal ratios and equivalent ratios.