Add 90/25 and 18/72
1st number: 3 15/25, 2nd number: 18/72
90/25 + 18/72 is 77/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 72 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 25 × 72 = 1800,
90/25 = 90 × 72/25 × 72 = 6480/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
18/72 = 18 × 25/72 × 25 = 450/1800 - Add the two like fractions:
6480/1800 + 450/1800 = 6480 + 450/1800 = 6930/1800 - 6930/1800 simplified gives 77/20
- So, 90/25 + 18/72 = 77/20
In mixed form: 317/20
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