Solution
= 30% of $$680 + 2\frac{3}{11}$$ of 1331
= $$\frac{30}{100}\times680+\frac{25}{11}of1331$$
= $$3\times68+\frac{25}{11}\times\ 1331$$
= $$204+25\times121$$
= 204+3025
= 3229
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