3/8 +7/8= 5/10 +7/10= 1 2/3 + 5/3= 7 2/9+23/9= 7 12/100+5 25/100=

3/8+7/8=(3+7)/8=10/8=5/4
5/10+7/10=(5+7)/10=12/10=6/5
1 2/3+5/3= 5/3+5/3=(5+5)/3=10/3
7 2/9+23/9=65/9+23/9=88/18=44/9
7 12/100+5 25/100=712/100+525/100=1237/100