Add 20/45 and 25/40
20/45 + 25/40 is 77/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
20/45 = 20 × 8/45 × 8 = 160/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
25/40 = 25 × 9/40 × 9 = 225/360 - Add the two like fractions:
160/360 + 225/360 = 160 + 225/360 = 385/360 - 385/360 simplified gives 77/72
- So, 20/45 + 25/40 = 77/72
In mixed form: 15/72
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