Subtract 21/90 from 45/4
1st number: 11 1/4, 2nd number: 21/90
45/4 - 21/90 is 661/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
45/4 = 45 × 45/4 × 45 = 2025/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
21/90 = 21 × 2/90 × 2 = 42/180 - Subtract the two like fractions:
2025/180 - 42/180 = 2025 - 42/180 = 1983/180 - After reducing the fraction, the answer is 661/60
- In mixed form: 111/60
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