Subtract 6/45 from 90/70, Solve 1 20/70

Subtract 6/45 from 90/70

1^st number: 1 20/70, 2^nd number: 6/45

90/70 - 6/45 is 121/105.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 45 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 70 × 9 = 630,
90/70 = 90 × 9/70 × 9 = 810/630
Likewise, for the 2nd fraction, since 45 × 14 = 630,
6/45 = 6 × 14/45 × 14 = 84/630
Subtract the two like fractions:
810/630 - 84/630 = 810 - 84/630 = 726/630
After reducing the fraction, the answer is 121/105
In mixed form: 116/105

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