Add 42/72 and 12/20
42/72 + 12/20 is 71/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
42/72 = 42 × 5/72 × 5 = 210/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
12/20 = 12 × 18/20 × 18 = 216/360 - Add the two like fractions:
210/360 + 216/360 = 210 + 216/360 = 426/360 - 426/360 simplified gives 71/60
- So, 42/72 + 12/20 = 71/60
In mixed form: 111/60
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