7/20
negative 7 -7 - 13 = -20 Example: if someone owed $7 and then also owed $13 the total owed would be $20
-20 negative 20 minus 20
3/4 - 2/5 = 15/20 - 8/20 = 7/20
-3/20 - 5/4 = -3/20 - 25/20 = -28/20 = -7/5
easy find 20% then minus it from 7.
-20 - 7 = -27
8/15 minus 7/20 is 11/60
20-7=13
7/20 minus 1/42 = 137/420
1 and 19/20
The inverse of add 7 is minus 7 Example: 20+7=27 to check do... 27-7=20
Converting to twentieths, we get 8 over 20 minus 15 over 20, resulting in minus 7 over 20.
3/20
3/4 minus 2/5 is 7/20
3/4 minus 7/10 is 1/20.
7 fourths minus 8 fifths = -1