Subtract 8/90 from 45/28, Solve 1 17/28

Subtract 8/90 from 45/28

1^st number: 1 17/28, 2^nd number: 8/90

45/28 - 8/90 is 1913/1260.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 28 × 45 = 1260,
45/28 = 45 × 45/28 × 45 = 2025/1260
Likewise, for the 2nd fraction, since 90 × 14 = 1260,
8/90 = 8 × 14/90 × 14 = 112/1260
Subtract the two like fractions:
2025/1260 - 112/1260 = 2025 - 112/1260 = 1913/1260
In mixed form: 1653/1260

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