Subtract 63/72 from 70/20
1st number: 3 10/20, 2nd number: 63/72
70/20 - 63/72 is 21/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
70/20 = 70 × 18/20 × 18 = 1260/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
63/72 = 63 × 5/72 × 5 = 315/360 - Subtract the two like fractions:
1260/360 - 315/360 = 1260 - 315/360 = 945/360 - After reducing the fraction, the answer is 21/8
- In mixed form: 25/8
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