Add 42/72 and 30/70
42/72 + 30/70 is 85/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
42/72 = 42 × 35/72 × 35 = 1470/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
30/70 = 30 × 36/70 × 36 = 1080/2520 - Add the two like fractions:
1470/2520 + 1080/2520 = 1470 + 1080/2520 = 2550/2520 - 2550/2520 simplified gives 85/84
- So, 42/72 + 30/70 = 85/84
In mixed form: 11/84
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