5/7, 10/14, 15/21
Depending if the 5 is in the "over 20" or not. Because what you stated is unclear, it can be (5+7)/20 or 5+7/20, which is two different answers, 0.6 and 5.35.
-2/5 ÷ 7/10 = -4/7
2/7 + 3/7 is 5/7, which can't be simplified.
2 over 7 + 3 over 7= 5 over 7
5/7 =10/14 =5/14+5/14
5/7, 10/14, 15/21
Depending if the 5 is in the "over 20" or not. Because what you stated is unclear, it can be (5+7)/20 or 5+7/20, which is two different answers, 0.6 and 5.35.
7 over 5
-2/5 ÷ 7/10 = -4/7
5:7 (or 5/7) is equivalent to 10:14 (10/14) and 15:21 (15/21).
Seven over fifteen minus two over five is: 7/15 - 2/5 = 7/15 - (2 x 3)/(5 x 3) = 7/15 - 6/15 = 1/15
2/7 + 3/7 is 5/7, which can't be simplified.
2 over 7 + 3 over 7= 5 over 7
7/5 = 1.47 over 5 is equal to 1.47/5=1.4
They are two mixed fractions.
6 over 7 minus 5 over 7 is 1 over 7.