Add 12/45 and 42/72
12/45 + 42/72 is 17/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
12/45 = 12 × 8/45 × 8 = 96/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
42/72 = 42 × 5/72 × 5 = 210/360 - Add the two like fractions:
96/360 + 210/360 = 96 + 210/360 = 306/360 - 306/360 simplified gives 17/20
- So, 12/45 + 42/72 = 17/20
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