Subtract 21/90 from 70/45
1st number: 1 25/45, 2nd number: 21/90
70/45 - 21/90 is 119/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
70/45 = 70 × 2/45 × 2 = 140/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Subtract the two like fractions:
140/90 - 21/90 = 140 - 21/90 = 119/90 - In mixed form: 129/90
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