Expressed as a proper fraction in its simplest form, 2/5 + 7/8 = 1 11/40 or one and eleven fortieths. Expressed as a decimal fraction, this is equal to 1.275.
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78 and a half
8+7 2/5=16 and two fifths
7/20
23/8 There are 16 eighths in 2 (2 x 8) plus 7 = 23
1 and 7 24ths