Add 72/40 and 28/90
1st number: 1 32/40, 2nd number: 28/90
72/40 + 28/90 is 19/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
72/40 = 72 × 9/40 × 9 = 648/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
28/90 = 28 × 4/90 × 4 = 112/360 - Add the two like fractions:
648/360 + 112/360 = 648 + 112/360 = 760/360 - 760/360 simplified gives 19/9
- So, 72/40 + 28/90 = 19/9
In mixed form: 21/9
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