+23251 The simplest way to add or subtract fractions is to write both fractions with the same denominator.
The denominators are 4 and 7; find a common denominator by multiplying these two numbers: 4 * 7 = 28.
Change -1/4 into a fraction with the common denominator by multiplying it by 7/7: -1/4 * 7/7 = -7/28.
Similarly, multiply 4/7 by 4/4: 4/7 * 4/4 = 16/28.
Now, the problem is: -7/28 + 16/28. To find the answer combine -7 + 16 and place this answer over the common denominator of 28.
-1/4 + 4/7 = -7/28 + 16/28 = (-7 + 16) / 28 = 9/28.
+23251 The simplest way to add or subtract fractions is to write both fractions with the same denominator.
The denominators are 4 and 7; find a common denominator by multiplying these two numbers: 4 * 7 = 28.
Change -1/4 into a fraction with the common denominator by multiplying it by 7/7: -1/4 * 7/7 = -7/28.
Similarly, multiply 4/7 by 4/4: 4/7 * 4/4 = 16/28.
Now, the problem is: -7/28 + 16/28. To find the answer combine -7 + 16 and place this answer over the common denominator of 28.
-1/4 + 4/7 = -7/28 + 16/28 = (-7 + 16) / 28 = 9/28.
