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John always spends 20% of his monthly salary and saves the rest. After a pay increment of 10%, his monthly expenditure increases by $150. (a) What was his monthly income before the pay increment? (b) How much was his savings after the pay increment? Notes to students: ...
Gina saves exactly 60% of her salary every month. Her salary for the month of September was 20% less than her salary for the month of August. As a result, she spent $360 less in September as compared to the previous month. What was her expenditure in August?
Carol would always use 20% of her monthly salary to fund her daughter’s music classes. She received 40% less salary in May as compared to April. As a result, the amount of money that she used for music classes in May was $120 less as compared to that in April. How much money did she use to fund her daughter's music classes in April?
In a zoo, there were 1200 animals. 70% of these were herbivores and the rest were carnivores. A few days later, a certain number of carnivores and herbivores were transported to the zoo. This caused the number of herbivores to increase by 120%. As a result, 20% of all the animals in the zoo are carnivores. (a) How many carnivores were ...
In a bakery, there were a total of 900 cakes and cookies. 70% of them were cakes. After some of the items were sold, the number of cakes decreased by 20%. In the end, 10% of the items in the bakery are cookies. (a) How many cookies were sold in all? (b) If the selling price of a cookie is $1.50 a piece, how much was collected from the sale of the cookies? ...
Helena had 1500 stamps in her album. She had only Indian and Australian stamps. 30% of these were Australian stamps. She visited an exhibition and purchased some new Indian and Australian stamps. Subsequently, the number of Indian stamps that she had increased by 20%. Eventually, 40% of the total number of stamps in Helena's album are ...
80% of the passengers on a train were adults. At Tedddyham station, 510 passengers boarded the train and 90 passengers alighted. After that, the number of adults increased by 25% and the number of children increased by 200%. How many adults are on the train now?
In the morning, 70% of the butterflies in a butterfly park were yellow coloured and the rest were brown coloured. Over the next few hours, 80 more butterflies came into the park. With the addition, the number of yellow butterflies went up by 20% and the number of brown butterflies increased by 120%. Find out the number of butterflies in the butterfly park now.
On the first day of a two-day seminar, 30% of the participants were women. On the second day, there were 174 less participants as compared to day one. There were 60% less women and 24% less men on the second day. Find the number of participants on the, (a) first day of the seminar. (b) second day of the seminar. ...
John's monthly salary is $2000. He spends 10% of his salary on the household, 50% of the remainder on mortgage payments and saves the rest. Subsequently he had a pay increment. Now, the total amount of his mortgage payments and household expenditures is still the same as before but it makes up 40% of his new salary. What was the percentage increase in his salary? & ...