Add 12/40 and 90/72
1st number: 12/40, 2nd number: 1 18/72
12/40 + 90/72 is 31/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
12/40 = 12 × 9/40 × 9 = 108/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Add the two like fractions:
108/360 + 450/360 = 108 + 450/360 = 558/360 - 558/360 simplified gives 31/20
- So, 12/40 + 90/72 = 31/20
In mixed form: 111/20
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