5 7/15 + 21 8/15
⚠ 5 7/15 is read as the mixed number 5 + 7/15
⚠ 21 8/15 is read as the mixed number 21 + 8/15
Let's evaluate: 5 + 715 + 21 + 815
ℹ5 + 21 = 26‖715 + 815 = 7 + 815
26 + 7 + 815
ℹ7 + 8 = 15
26 + 1515
ℹ1515 = 1
26 + 1
▶Result:   27