Subtract 72/49 from 70/21
1st number: 3 7/21, 2nd number: 1 23/49
70/21 - 72/49 is 274/147.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
70/21 = 70 × 7/21 × 7 = 490/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
72/49 = 72 × 3/49 × 3 = 216/147 - Subtract the two like fractions:
490/147 - 216/147 = 490 - 216/147 = 274/147 - In mixed form: 1127/147
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