Add 40/70 and 72/80
40/70 + 72/80 is 103/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
40/70 = 40 × 8/70 × 8 = 320/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
72/80 = 72 × 7/80 × 7 = 504/560 - Add the two like fractions:
320/560 + 504/560 = 320 + 504/560 = 824/560 - 824/560 simplified gives 103/70
- So, 40/70 + 72/80 = 103/70
In mixed form: 133/70
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