It is one and nine twentieths.
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Multiply two fifths by two to get a common denominator. Then you will have 4 tenths plus three tenths. then add straight across and you will get seven tenths.
3/10 + 7/10 = 1
seven and eight tenths. you have to change one half to five tenths and then add the whole numbers and then the fraction
4/5 is what a half plus three tenths equals.
76 and three tenths.