Add 72/80 and 7/45
72/80 + 7/45 is 19/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
72/80 = 72 × 9/80 × 9 = 648/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
7/45 = 7 × 16/45 × 16 = 112/720 - Add the two like fractions:
648/720 + 112/720 = 648 + 112/720 = 760/720 - 760/720 simplified gives 19/18
- So, 72/80 + 7/45 = 19/18
In mixed form: 11/18
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